Washington 1990 USDA Hardiness Zone Map
View the new 2023 Washington Hardiness Zone Map
| Zone 4b -25°F to -20°F | Zone 5a -20°F to -15°F | Zone 5b -15°F to -10°F | Zone 6a -10°F to -5°F | Zone 6b -5°F to 0°F |
| Zone 7a 0°F to 5°F | Zone 7b 5°F to 10°F | Zone 8a 10°F to 15°F | Zone 8b 15°F to 20°F | Zone 9a 20°F to 25°F |
Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Washington which ranges from USDA Zone 4b to USDA Zone 9a.
1990 USDA Hardiness Zone Maps for Neighboring States and Provinces
Related Washington Maps:
List of 1990 Hardiness Zones for Cities in Washington
| Location | Hardiness Zone |
|---|---|
| Aberdeen | Zone 8a: 10°F to 15°F |
| Aberdeen Gardens | Zone 8a: 10°F to 15°F |
| Acme | Zone 8a: 10°F to 15°F |
| Addy | Zone 5a: -20°F to -15°F |
| Adna | Zone 8a: 10°F to 15°F |
| Agnew | Zone 8a: 10°F to 15°F |
| Ahtanum | Zone 6b: -5°F to 0°F |
| Airway Heights | Zone 5b: -15°F to -10°F |
| Albion | Zone 6a: -10°F to -5°F |
| Alder | Zone 8a: 10°F to 15°F |
| Alderton | Zone 8a: 10°F to 15°F |
| Alderwood Manor | Zone 8a: 10°F to 15°F |
| Alger | Zone 8a: 10°F to 15°F |
| Algona | Zone 8a: 10°F to 15°F |
| Allyn | Zone 8a: 10°F to 15°F |
| Almira | Zone 6a: -10°F to -5°F |
| Altoona | Zone 8b: 15°F to 20°F |
| Amanda Park | Zone 8a: 10°F to 15°F |
| Amboy | Zone 8a: 10°F to 15°F |
| Ames Lake | Zone 8a: 10°F to 15°F |
| Anacortes | Zone 8a: 10°F to 15°F |
| Anatone | Zone 6b: -5°F to 0°F |
| Anderson Island | Zone 8a: 10°F to 15°F |
| Appleton | Zone 7a: 0°F to 5°F |
| Ardenvoir | Zone 5b: -15°F to -10°F |
| Ariel | Zone 8a: 10°F to 15°F |
| Arlington | Zone 8a: 10°F to 15°F |
| Arlington Heights | Zone 8a: 10°F to 15°F |
| Artondale | Zone 8a: 10°F to 15°F |
| Ashford | Zone 8a: 10°F to 15°F |
| Asotin | Zone 6a: -10°F to -5°F |
| Auburn | Zone 8a: 10°F to 15°F |
| Ault Field | Zone 8a: 10°F to 15°F |
| Bainbridge Island | Zone 8a: 10°F to 15°F |
| Bangor Trident Base | Zone 8a: 10°F to 15°F |
| Banks Lake South | Zone 6a: -10°F to -5°F |
| Barberton | Zone 8a: 10°F to 15°F |
| Baring | Zone 7b: 5°F to 10°F |
| Barstow | Zone 5a: -20°F to -15°F |
| Basin City | Zone 6b: -5°F to 0°F |
| Battle Ground | Zone 8a: 10°F to 15°F |
| Bay Center | Zone 8b: 15°F to 20°F |
| Bay View | Zone 8a: 10°F to 15°F |
| Beaux Arts Village | Zone 8a: 10°F to 15°F |
| Beaver | Zone 8a: 10°F to 15°F |
| Belfair | Zone 8a: 10°F to 15°F |
| Bell Hill | Zone 8a: 10°F to 15°F |
| Bellevue | Zone 8a: 10°F to 15°F |
| Bellingham | Zone 8a: 10°F to 15°F |
| Belmont | Zone 5b: -15°F to -10°F |
| Benge | Zone 6a: -10°F to -5°F |
| Benton City | Zone 7a: 0°F to 5°F |
| Bethel | Zone 8a: 10°F to 15°F |
| Beverly | Zone 6b: -5°F to 0°F |
| Bickleton | Zone 7a: 0°F to 5°F |
| Big Lake | Zone 8a: 10°F to 15°F |
| Bingen | Zone 7b: 5°F to 10°F |
| Birch Bay | Zone 8a: 10°F to 15°F |
| Black Diamond | Zone 8a: 10°F to 15°F |
| Blaine | Zone 8a: 10°F to 15°F |
| Blakely Island | Zone 8a: 10°F to 15°F |
| Blueslide | Zone 5b: -15°F to -10°F |
| Blyn | Zone 8a: 10°F to 15°F |
| Bonney Lake | Zone 8a: 10°F to 15°F |
| Bothell | Zone 8a: 10°F to 15°F |
| Boulevard Park | Zone 8a: 10°F to 15°F |
| Boundary | Zone 5b: -15°F to -10°F |
| Bow | Zone 8a: 10°F to 15°F |
| Boyds | Zone 5a: -20°F to -15°F |
| Brady | Zone 8a: 10°F to 15°F |
| Bremerton | Zone 8a: 10°F to 15°F |
| Brewster | Zone 6a: -10°F to -5°F |
| Bridgeport | Zone 6a: -10°F to -5°F |
| Brier | Zone 8a: 10°F to 15°F |
| Brinnon | Zone 8a: 10°F to 15°F |
| Brownstown | Zone 6b: -5°F to 0°F |
| Brush Prairie | Zone 8a: 10°F to 15°F |
| Bryant | Zone 8a: 10°F to 15°F |
| Bryn Mawr-Skyway | Zone 8a: 10°F to 15°F |
| Buckley | Zone 8a: 10°F to 15°F |
| Bucoda | Zone 8a: 10°F to 15°F |
| Buena | Zone 6b: -5°F to 0°F |
| Burbank | Zone 7a: 0°F to 5°F |
| Burien | Zone 8a: 10°F to 15°F |
| Burley | Zone 8a: 10°F to 15°F |
| Burlington | Zone 8a: 10°F to 15°F |
| Burton | Zone 8a: 10°F to 15°F |
| Camano | Zone 8a: 10°F to 15°F |
| Camano Island | Zone 8a: 10°F to 15°F |
| Camas | Zone 8b: 15°F to 20°F |
| Camp Murray | Zone 8a: 10°F to 15°F |
| Canterwood | Zone 8a: 10°F to 15°F |
| Carbonado | Zone 8a: 10°F to 15°F |
| Carlsborg | Zone 8a: 10°F to 15°F |
| Carlton | Zone 5b: -15°F to -10°F |
| Carnation | Zone 8a: 10°F to 15°F |
| Carrolls | Zone 8b: 15°F to 20°F |
| Carson | Zone 8a: 10°F to 15°F |
| Carson River Valley | Zone 8a: 10°F to 15°F |
| Cascade Park East | Zone 8b: 15°F to 20°F |
| Cascade Park West | Zone 8b: 15°F to 20°F |
| Cascade Valley | Zone 6a: -10°F to -5°F |
| Cascade-Fairwood | Zone 8a: 10°F to 15°F |
| Cashmere | Zone 6a: -10°F to -5°F |
| Castle Rock | Zone 8b: 15°F to 20°F |
| Cathan | Zone 8a: 10°F to 15°F |
| Cathcart | Zone 8a: 10°F to 15°F |
| Cathlamet | Zone 8b: 15°F to 20°F |
| Cedonia | Zone 5b: -15°F to -10°F |
| Centerville | Zone 7a: 0°F to 5°F |
| Central Park | Zone 8a: 10°F to 15°F |
| Centralia | Zone 8a: 10°F to 15°F |
| Chattaroy | Zone 5b: -15°F to -10°F |
| Chehalis | Zone 8a: 10°F to 15°F |
| Chehalis Village | Zone 8a: 10°F to 15°F |
| Chehalis/Centralia | Zone 8a: 10°F to 15°F |
| Chelan | Zone 6a: -10°F to -5°F |
| Chelan Falls | Zone 6a: -10°F to -5°F |
| Cheney | Zone 5b: -15°F to -10°F |
| Cherry Grove | Zone 8a: 10°F to 15°F |
| Chesaw | Zone 5a: -20°F to -15°F |
| Chewelah | Zone 5a: -20°F to -15°F |
| Chico | Zone 8a: 10°F to 15°F |
| Chimacum | Zone 9a: 20°F to 25°F |
| Chinook | Zone 8b: 15°F to 20°F |
| Cinebar | Zone 8a: 10°F to 15°F |
| Clallam Bay | Zone 8a: 10°F to 15°F |
| Clarkston | Zone 6b: -5°F to 0°F |
| Clarkston Heights-Vineland | Zone 6a: -10°F to -5°F |
| Clayton | Zone 5b: -15°F to -10°F |
| Cle Elum | Zone 5b: -15°F to -10°F |
| Clear Lake | Zone 8a: 10°F to 15°F |
| Clearview | Zone 8a: 10°F to 15°F |
| Clearwater | Zone 8a: 10°F to 15°F |
| Cliffdell | Zone 6a: -10°F to -5°F |
| Clinton | Zone 8a: 10°F to 15°F |
| Clipper | Zone 8a: 10°F to 15°F |
| Clyde Hill | Zone 8a: 10°F to 15°F |
| Cohassett Beach | Zone 8b: 15°F to 20°F |
| Colbert | Zone 5b: -15°F to -10°F |
| Colfax | Zone 6a: -10°F to -5°F |
| College Place | Zone 6b: -5°F to 0°F |
| Colton | Zone 6b: -5°F to 0°F |
| Colville | Zone 5a: -20°F to -15°F |
| Colville Agency | Zone 6a: -10°F to -5°F |
| Conconully | Zone 5b: -15°F to -10°F |
| Concrete | Zone 7b: 5°F to 10°F |
| Connell | Zone 6b: -5°F to 0°F |
| Conway | Zone 8a: 10°F to 15°F |
| Copalis Beach | Zone 8a: 10°F to 15°F |
| Copalis Crossing | Zone 8a: 10°F to 15°F |
| Cosmopolis | Zone 8a: 10°F to 15°F |
| Cottage Lake | Zone 8a: 10°F to 15°F |
| Cougar | Zone 8a: 10°F to 15°F |
| Coulee City | Zone 6a: -10°F to -5°F |
| Coulee Dam | Zone 6a: -10°F to -5°F |
| Country Homes | Zone 5b: -15°F to -10°F |
| Coupeville | Zone 8a: 10°F to 15°F |
| Covington | Zone 8a: 10°F to 15°F |
| Cowiche | Zone 6b: -5°F to 0°F |
| Creston | Zone 5b: -15°F to -10°F |
| Cunningham | Zone 6a: -10°F to -5°F |
| Curlew | Zone 5a: -20°F to -15°F |
| Curtis | Zone 8a: 10°F to 15°F |
| Cusick | Zone 5b: -15°F to -10°F |
| Custer | Zone 8a: 10°F to 15°F |
| Dalkena | Zone 5b: -15°F to -10°F |
| Dallesport | Zone 7a: 0°F to 5°F |
| Danville | Zone 5a: -20°F to -15°F |
| Darrington | Zone 7b: 5°F to 10°F |
| Dash Point | Zone 8a: 10°F to 15°F |
| Davenport | Zone 5b: -15°F to -10°F |
| Dayton | Zone 6b: -5°F to 0°F |
| Deep River | Zone 8b: 15°F to 20°F |
| Deer Harbor | Zone 8a: 10°F to 15°F |
| Deer Park | Zone 5b: -15°F to -10°F |
| Deming | Zone 8a: 10°F to 15°F |
| Des Moines | Zone 8a: 10°F to 15°F |
| Desert Aire | Zone 7a: 0°F to 5°F |
| Disautel | Zone 5b: -15°F to -10°F |
| Dishman | Zone 6a: -10°F to -5°F |
| Dixie | Zone 6b: -5°F to 0°F |
| Doebay | Zone 8a: 10°F to 15°F |
| Dollar Corner | Zone 8a: 10°F to 15°F |
| Donald | Zone 6b: -5°F to 0°F |
| Doty | Zone 8a: 10°F to 15°F |
| Dryden | Zone 6a: -10°F to -5°F |
| Dulwich | Zone 5a: -20°F to -15°F |
| Dungeness | Zone 8a: 10°F to 15°F |
| Dupont | Zone 8a: 10°F to 15°F |
| Duvall | Zone 8a: 10°F to 15°F |
| East Cathlamet | Zone 8b: 15°F to 20°F |
| East Hill-Meridian | Zone 8a: 10°F to 15°F |
| East Olympia | Zone 7b: 5°F to 10°F |
| East Port Orchard | Zone 8a: 10°F to 15°F |
| East Renton Highlands | Zone 8a: 10°F to 15°F |
| East Wenatchee | Zone 6a: -10°F to -5°F |
| East Wenatchee Bench | Zone 6a: -10°F to -5°F |
| Eastgate | Zone 8a: 10°F to 15°F |
| Easton | Zone 6a: -10°F to -5°F |
| Eastsound | Zone 8a: 10°F to 15°F |
| Eatonville | Zone 8a: 10°F to 15°F |
| Echo Lake | Zone 8a: 10°F to 15°F |
| Edgewood | Zone 8a: 10°F to 15°F |
| Edison | Zone 8a: 10°F to 15°F |
| Edmonds | Zone 8a: 10°F to 15°F |
| Edwall | Zone 5b: -15°F to -10°F |
| Elbe | Zone 8a: 10°F to 15°F |
| Electric City | Zone 6b: -5°F to 0°F |
| Elk | Zone 5b: -15°F to -10°F |
| Elk Plain | Zone 8a: 10°F to 15°F |
| Ellensburg | Zone 6a: -10°F to -5°F |
| Ellisforde | Zone 5a: -20°F to -15°F |
| Ellsworth North | Zone 8b: 15°F to 20°F |
| Ellsworth South | Zone 8b: 15°F to 20°F |
| Elma | Zone 8a: 10°F to 15°F |
| Elmer City | Zone 6a: -10°F to -5°F |
| Eltopia | Zone 6b: -5°F to 0°F |
| Endicott | Zone 6a: -10°F to -5°F |
| Enetai | Zone 8a: 10°F to 15°F |
| Entiat | Zone 5b: -15°F to -10°F |
| Enumclaw | Zone 8a: 10°F to 15°F |
| Ephrata | Zone 6a: -10°F to -5°F |
| Erlands Point-Kitsap Lake | Zone 8a: 10°F to 15°F |
| Eschbach | Zone 6b: -5°F to 0°F |
| Esperance | Zone 8a: 10°F to 15°F |
| Ethel | Zone 8a: 10°F to 15°F |
| Evans | Zone 5a: -20°F to -15°F |
| Everett | Zone 8a: 10°F to 15°F |
| Evergreen | Zone 8b: 15°F to 20°F |
| Everson | Zone 8a: 10°F to 15°F |
| Fairchild AFB | Zone 5b: -15°F to -10°F |
| Fairfield | Zone 6a: -10°F to -5°F |
| Fairholm | Zone 8a: 10°F to 15°F |
| Fairwood | Zone 5b: -15°F to -10°F |
| Fall City | Zone 8a: 10°F to 15°F |
| Farmington | Zone 5b: -15°F to -10°F |
| Federal Way | Zone 8a: 10°F to 15°F |
| Felida | Zone 8a: 10°F to 15°F |
| Fern Prairie | Zone 8b: 15°F to 20°F |
| Ferndale | Zone 8a: 10°F to 15°F |
| Fife | Zone 8a: 10°F to 15°F |
| Fife Heights | Zone 8a: 10°F to 15°F |
| Finley | Zone 6b: -5°F to 0°F |
| Fircrest | Zone 8a: 10°F to 15°F |
| Five Corners | Zone 8a: 10°F to 15°F |
| Fobes Hill | Zone 8a: 10°F to 15°F |
| Ford | Zone 5b: -15°F to -10°F |
| Fords Prairie | Zone 8a: 10°F to 15°F |
| Forks | Zone 8a: 10°F to 15°F |
| Forston | Zone 7b: 5°F to 10°F |
| Fort Flagler | Zone 9a: 20°F to 25°F |
| Fort Lewis | Zone 8a: 10°F to 15°F |
| Four Lakes | Zone 5b: -15°F to -10°F |
| Fox Island | Zone 8a: 10°F to 15°F |
| Frederickson | Zone 8a: 10°F to 15°F |
| Freeland | Zone 8a: 10°F to 15°F |
| Freeman | Zone 6a: -10°F to -5°F |
| Friday Harbor | Zone 8a: 10°F to 15°F |
| Fruitland | Zone 6a: -10°F to -5°F |
| Fruitvale | Zone 6b: -5°F to 0°F |
| Furport | Zone 5b: -15°F to -10°F |
| Galvin | Zone 8a: 10°F to 15°F |
| Garfield | Zone 5b: -15°F to -10°F |
| Garrett | Zone 6b: -5°F to 0°F |
| Geneva | Zone 8a: 10°F to 15°F |
| George | Zone 6a: -10°F to -5°F |
| Getchell | Zone 8a: 10°F to 15°F |
| Gifford | Zone 5b: -15°F to -10°F |
| Gig Harbor | Zone 8a: 10°F to 15°F |
| Glacier | Zone 7b: 5°F to 10°F |
| Gleed | Zone 6b: -5°F to 0°F |
| Glenoma | Zone 8a: 10°F to 15°F |
| Glenwood | Zone 6a: -10°F to -5°F |
| Gold Bar | Zone 8a: 10°F to 15°F |
| Goldendale | Zone 6b: -5°F to 0°F |
| Goose Prairie | Zone 6a: -10°F to -5°F |
| Gorst | Zone 8a: 10°F to 15°F |
| Graham | Zone 8a: 10°F to 15°F |
| Grand Coulee | Zone 6b: -5°F to 0°F |
| Grand Mound | Zone 8a: 10°F to 15°F |
| Grandview | Zone 7a: 0°F to 5°F |
| Granger | Zone 7a: 0°F to 5°F |
| Granite Falls | Zone 8a: 10°F to 15°F |
| Grapeview | Zone 8a: 10°F to 15°F |
| Grayland | Zone 8b: 15°F to 20°F |
| Grays River | Zone 8b: 15°F to 20°F |
| Green Acres | Zone 6a: -10°F to -5°F |
| Green Bluff | Zone 5b: -15°F to -10°F |
| Greenacres | Zone 6a: -10°F to -5°F |
| Greenbank | Zone 8a: 10°F to 15°F |
| Greenwater | Zone 7a: 0°F to 5°F |
| Hamilton | Zone 8a: 10°F to 15°F |
| Hansville | Zone 8a: 10°F to 15°F |
| Harbour Pointe | Zone 8a: 10°F to 15°F |
| Harrah | Zone 6b: -5°F to 0°F |
| Harrington | Zone 5b: -15°F to -10°F |
| Hartline | Zone 6a: -10°F to -5°F |
| Hatton | Zone 6a: -10°F to -5°F |
| Hay | Zone 6a: -10°F to -5°F |
| Hazel Dell | Zone 8b: 15°F to 20°F |
| Hazel Dell North | Zone 8a: 10°F to 15°F |
| Hazel Dell South | Zone 8b: 15°F to 20°F |
| Heisson | Zone 8a: 10°F to 15°F |
| Highland | Zone 6b: -5°F to 0°F |
| Hobart | Zone 8a: 10°F to 15°F |
| Hockinson | Zone 8a: 10°F to 15°F |
| Home | Zone 7b: 5°F to 10°F |
| Hoodsport | Zone 8a: 10°F to 15°F |
| Hooper | Zone 6a: -10°F to -5°F |
| Hoquiam | Zone 8a: 10°F to 15°F |
| Humptulips | Zone 8a: 10°F to 15°F |
| Hunters | Zone 5b: -15°F to -10°F |
| Hunts Point | Zone 8a: 10°F to 15°F |
| Husum | Zone 7b: 5°F to 10°F |
| Ilwaco | Zone 8b: 15°F to 20°F |
| Inchelium | Zone 5b: -15°F to -10°F |
| Index | Zone 7b: 5°F to 10°F |
| Indianola | Zone 8a: 10°F to 15°F |
| Inglewood-Finn Hill | Zone 8a: 10°F to 15°F |
| Ione | Zone 5b: -15°F to -10°F |
| Issaquah | Zone 8a: 10°F to 15°F |
| Jamestown | Zone 8a: 10°F to 15°F |
| Jared | Zone 5b: -15°F to -10°F |
| John Sam Lake | Zone 8a: 10°F to 15°F |
| Joyce | Zone 8a: 10°F to 15°F |
| Junction City | Zone 8a: 10°F to 15°F |
| Kahlotus | Zone 6a: -10°F to -5°F |
| Kalaloch | Zone 8a: 10°F to 15°F |
| Kalama | Zone 8b: 15°F to 20°F |
| Kapowsin | Zone 8a: 10°F to 15°F |
| Keller | Zone 6a: -10°F to -5°F |
| Kelso | Zone 8b: 15°F to 20°F |
| Kendall | Zone 8a: 10°F to 15°F |
| Kenmore | Zone 8a: 10°F to 15°F |
| Kennewick | Zone 7a: 0°F to 5°F |
| Kent | Zone 8a: 10°F to 15°F |
| Ketron | Zone 8a: 10°F to 15°F |
| Kettle Falls | Zone 5b: -15°F to -10°F |
| Key Center | Zone 8a: 10°F to 15°F |
| Keyport | Zone 8a: 10°F to 15°F |
| Kingsgate | Zone 8a: 10°F to 15°F |
| Kingston | Zone 8a: 10°F to 15°F |
| Kirkland | Zone 8a: 10°F to 15°F |
| Kittitas | Zone 6a: -10°F to -5°F |
| Klahanie | Zone 8a: 10°F to 15°F |
| Klickitat | Zone 6b: -5°F to 0°F |
| Krupp | Zone 6a: -10°F to -5°F |
| La Center | Zone 8a: 10°F to 15°F |
| La Conner | Zone 8a: 10°F to 15°F |
| La Crosse | Zone 6a: -10°F to -5°F |
| La Grande | Zone 8a: 10°F to 15°F |
| La Push | Zone 8a: 10°F to 15°F |
| Lacey | Zone 7b: 5°F to 10°F |
| Lafleur | Zone 6a: -10°F to -5°F |
| Lake Bosworth | Zone 8a: 10°F to 15°F |
| Lake Cavanaugh | Zone 8a: 10°F to 15°F |
| Lake Forest North | Zone 8a: 10°F to 15°F |
| Lake Forest Park | Zone 8a: 10°F to 15°F |
| Lake Goodwin | Zone 8a: 10°F to 15°F |
| Lake Ketchum | Zone 8a: 10°F to 15°F |
| Lake Marcel-Stillwater | Zone 8a: 10°F to 15°F |
| Lake McMurray | Zone 8a: 10°F to 15°F |
| Lake Morton-Berrydale | Zone 8a: 10°F to 15°F |
| Lake Roesiger | Zone 8a: 10°F to 15°F |
| Lake Shore | Zone 8a: 10°F to 15°F |
| Lake Stevens | Zone 8a: 10°F to 15°F |
| Lakebay | Zone 7b: 5°F to 10°F |
| Lakeland North | Zone 8a: 10°F to 15°F |
| Lakeland South | Zone 8a: 10°F to 15°F |
| Lakeview | Zone 6a: -10°F to -5°F |
| Lakewood | Zone 8a: 10°F to 15°F |
| Lamona | Zone 5b: -15°F to -10°F |
| Lamont | Zone 5b: -15°F to -10°F |
| Langley | Zone 8a: 10°F to 15°F |
| Latah | Zone 6a: -10°F to -5°F |
| Laurier | Zone 5a: -20°F to -15°F |
| Lea Hill | Zone 8a: 10°F to 15°F |
| Leadpoint | Zone 5b: -15°F to -10°F |
| Leavenworth | Zone 6a: -10°F to -5°F |
| Lebam | Zone 8a: 10°F to 15°F |
| Lewisville | Zone 8a: 10°F to 15°F |
| Liberty Lake | Zone 6b: -5°F to 0°F |
| Lilliwaup | Zone 8a: 10°F to 15°F |
| Lincoln | Zone 5b: -15°F to -10°F |
| Lind | Zone 6a: -10°F to -5°F |
| Littlerock | Zone 7b: 5°F to 10°F |
| Lochsloy | Zone 8a: 10°F to 15°F |
| Lofall | Zone 8a: 10°F to 15°F |
| Long Beach | Zone 8b: 15°F to 20°F |
| Longbranch | Zone 7b: 5°F to 10°F |
| Longmire | Zone 7b: 5°F to 10°F |
| Longview | Zone 8b: 15°F to 20°F |
| Longview Heights | Zone 8b: 15°F to 20°F |
| Loomis | Zone 5a: -20°F to -15°F |
| Loon Lake | Zone 5a: -20°F to -15°F |
| Lopez Island | Zone 8a: 10°F to 15°F |
| Lummi Island | Zone 8a: 10°F to 15°F |
| Lyle | Zone 7b: 5°F to 10°F |
| Lyman | Zone 8a: 10°F to 15°F |
| Lynden | Zone 8a: 10°F to 15°F |
| Lynnwood | Zone 8a: 10°F to 15°F |
| Mabana | Zone 8a: 10°F to 15°F |
| Mabton | Zone 7a: 0°F to 5°F |
| Machias | Zone 8a: 10°F to 15°F |
| Malaga | Zone 6a: -10°F to -5°F |
| Malden | Zone 6a: -10°F to -5°F |
| Malo | Zone 5a: -20°F to -15°F |
| Malone | Zone 8a: 10°F to 15°F |
| Malott | Zone 5b: -15°F to -10°F |
| Maltby | Zone 8a: 10°F to 15°F |
| Manchester | Zone 8a: 10°F to 15°F |
| Mansfield | Zone 6a: -10°F to -5°F |
| Manson | Zone 6a: -10°F to -5°F |
| Maple Falls | Zone 8a: 10°F to 15°F |
| Maple Heights-Lake Desire | Zone 8a: 10°F to 15°F |
| Maple Valley | Zone 8a: 10°F to 15°F |
| Marblemount | Zone 7a: 0°F to 5°F |
| Marcus | Zone 5a: -20°F to -15°F |
| Marietta | Zone 8a: 10°F to 15°F |
| Marietta-Alderwood | Zone 8a: 10°F to 15°F |
| Markham | Zone 8b: 15°F to 20°F |
| Marlin | Zone 6a: -10°F to -5°F |
| Marrowstone | Zone 9a: 20°F to 25°F |
| Marshall | Zone 5b: -15°F to -10°F |
| Martha Lake | Zone 8a: 10°F to 15°F |
| Maryhill | Zone 7a: 0°F to 5°F |
| Marysville | Zone 8a: 10°F to 15°F |
| Matlock | Zone 8a: 10°F to 15°F |
| Mattawa | Zone 7a: 0°F to 5°F |
| May Creek | Zone 8a: 10°F to 15°F |
| Mazama | Zone 4b: -25°F to -20°F |
| McChord Air Force Base | Zone 8a: 10°F to 15°F |
| McCleary | Zone 8a: 10°F to 15°F |
| McKenna | Zone 8a: 10°F to 15°F |
| McMillin | Zone 8a: 10°F to 15°F |
| Mead | Zone 5b: -15°F to -10°F |
| Meadow Glade | Zone 8a: 10°F to 15°F |
| Meadowdale | Zone 8a: 10°F to 15°F |
| Medical Lake | Zone 5b: -15°F to -10°F |
| Medina | Zone 8a: 10°F to 15°F |
| Megler | Zone 8b: 15°F to 20°F |
| Menlo | Zone 8b: 15°F to 20°F |
| Mercer Island | Zone 8a: 10°F to 15°F |
| Mesa | Zone 6b: -5°F to 0°F |
| Metaline | Zone 5b: -15°F to -10°F |
| Metaline Falls | Zone 5b: -15°F to -10°F |
| Methow | Zone 6a: -10°F to -5°F |
| Mica | Zone 6a: -10°F to -5°F |
| Midland | Zone 8a: 10°F to 15°F |
| Mill Creek | Zone 8a: 10°F to 15°F |
| Mill Plain | Zone 8b: 15°F to 20°F |
| Millwood | Zone 5b: -15°F to -10°F |
| Milton | Zone 8a: 10°F to 15°F |
| Mineral | Zone 8a: 10°F to 15°F |
| Minnehaha | Zone 8b: 15°F to 20°F |
| Mirrormont | Zone 8a: 10°F to 15°F |
| Moclips | Zone 8a: 10°F to 15°F |
| Mohler | Zone 5b: -15°F to -10°F |
| Monitor | Zone 6a: -10°F to -5°F |
| Monroe | Zone 8a: 10°F to 15°F |
| Monse | Zone 6a: -10°F to -5°F |
| Monte Cristo | Zone 7a: 0°F to 5°F |
| Montesano | Zone 8a: 10°F to 15°F |
| Morton | Zone 8a: 10°F to 15°F |
| Moses Lake | Zone 6a: -10°F to -5°F |
| Moses Lake North | Zone 6a: -10°F to -5°F |
| Mossyrock | Zone 8a: 10°F to 15°F |
| Mount Rainier Natl Park | Zone 6b: -5°F to 0°F |
| Mount Vernon | Zone 8a: 10°F to 15°F |
| Mount Vista | Zone 8a: 10°F to 15°F |
| Mountlake Terrace | Zone 8a: 10°F to 15°F |
| Moxee | Zone 6b: -5°F to 0°F |
| Mukilteo | Zone 8a: 10°F to 15°F |
| Naches | Zone 6b: -5°F to 0°F |
| Nahcotta | Zone 8b: 15°F to 20°F |
| Napavine | Zone 8a: 10°F to 15°F |
| Naselle | Zone 8b: 15°F to 20°F |
| Navy Yard City | Zone 8a: 10°F to 15°F |
| Neah Bay | Zone 8a: 10°F to 15°F |
| Neilton | Zone 8a: 10°F to 15°F |
| Nespelem | Zone 6a: -10°F to -5°F |
| Nespelem Community | Zone 6a: -10°F to -5°F |
| Newcastle | Zone 8a: 10°F to 15°F |
| Newman Lake | Zone 6b: -5°F to 0°F |
| Newport | Zone 5b: -15°F to -10°F |
| Newport Hills | Zone 8a: 10°F to 15°F |
| Nighthawk | Zone 5a: -20°F to -15°F |
| Nile | Zone 6a: -10°F to -5°F |
| Nine Mile Falls | Zone 5b: -15°F to -10°F |
| Nisqually Indian Community | Zone 8a: 10°F to 15°F |
| Nooksack | Zone 8a: 10°F to 15°F |
| Nordland | Zone 9a: 20°F to 25°F |
| Normandy Park | Zone 8a: 10°F to 15°F |
| North Bend | Zone 8a: 10°F to 15°F |
| North Bonneville | Zone 8b: 15°F to 20°F |
| North Cascades Natl Park | Zone 6b: -5°F to 0°F |
| North Creek | Zone 8a: 10°F to 15°F |
| North Hill | Zone 8a: 10°F to 15°F |
| North Lakewood | Zone 8a: 10°F to 15°F |
| North Marysville | Zone 8a: 10°F to 15°F |
| North Omak | Zone 5b: -15°F to -10°F |
| North Puyallup | Zone 8a: 10°F to 15°F |
| North Stanwood | Zone 8a: 10°F to 15°F |
| North Sultan | Zone 8a: 10°F to 15°F |
| North Yelm | Zone 8a: 10°F to 15°F |
| Northport | Zone 5b: -15°F to -10°F |
| Oak Harbor | Zone 8a: 10°F to 15°F |
| Oakesdale | Zone 6a: -10°F to -5°F |
| Oakville | Zone 8a: 10°F to 15°F |
| Ocean City | Zone 8a: 10°F to 15°F |
| Ocean Park | Zone 8b: 15°F to 20°F |
| Ocean Shores | Zone 8a: 10°F to 15°F |
| Odessa | Zone 6a: -10°F to -5°F |
| Okanogan | Zone 5b: -15°F to -10°F |
| Olalla | Zone 8a: 10°F to 15°F |
| Olga | Zone 8a: 10°F to 15°F |
| Olympia | Zone 7b: 5°F to 10°F |
| Olympic Hot Springs | Zone 8a: 10°F to 15°F |
| Olympic Natl Park | Zone 8a: 10°F to 15°F |
| Omak | Zone 5b: -15°F to -10°F |
| Onalaska | Zone 8a: 10°F to 15°F |
| Onion Creek | Zone 5a: -20°F to -15°F |
| Opportunity | Zone 6a: -10°F to -5°F |
| Orcas | Zone 8a: 10°F to 15°F |
| Orchards | Zone 8a: 10°F to 15°F |
| Orchards North | Zone 8a: 10°F to 15°F |
| Orchards South | Zone 8a: 10°F to 15°F |
| Orient | Zone 5a: -20°F to -15°F |
| Orin | Zone 5a: -20°F to -15°F |
| Orondo | Zone 6a: -10°F to -5°F |
| Oroville | Zone 5a: -20°F to -15°F |
| Orting | Zone 8a: 10°F to 15°F |
| Oso | Zone 8a: 10°F to 15°F |
| Othello | Zone 6b: -5°F to 0°F |
| Otis Orchards | Zone 6b: -5°F to 0°F |
| Otis Orchards-East Farms | Zone 6b: -5°F to 0°F |
| Outlook | Zone 7a: 0°F to 5°F |
| Oyehut | Zone 8a: 10°F to 15°F |
| Oysterville | Zone 8b: 15°F to 20°F |
| Ozette | Zone 8a: 10°F to 15°F |
| Pacific | Zone 8a: 10°F to 15°F |
| Pacific Beach | Zone 8a: 10°F to 15°F |
| Packwood | Zone 7b: 5°F to 10°F |
| Palisades | Zone 6a: -10°F to -5°F |
| Palouse | Zone 5b: -15°F to -10°F |
| Paradise Inn | Zone 8a: 10°F to 15°F |
| Parker | Zone 6b: -5°F to 0°F |
| Parkland | Zone 8a: 10°F to 15°F |
| Parkwood | Zone 8a: 10°F to 15°F |
| Pasco | Zone 7a: 0°F to 5°F |
| Pateros | Zone 6a: -10°F to -5°F |
| Paterson | Zone 7a: 0°F to 5°F |
| Pe Ell | Zone 8a: 10°F to 15°F |
| Peaceful Valley | Zone 8a: 10°F to 15°F |
| Peshastin | Zone 6a: -10°F to -5°F |
| Piedmont | Zone 8a: 10°F to 15°F |
| Pine Lake | Zone 8a: 10°F to 15°F |
| Plain | Zone 5b: -15°F to -10°F |
| Plymouth | Zone 6b: -5°F to 0°F |
| Point Roberts | Zone 8a: 10°F to 15°F |
| Pomeroy | Zone 6b: -5°F to 0°F |
| Port Angeles | Zone 8a: 10°F to 15°F |
| Port Angeles East | Zone 8a: 10°F to 15°F |
| Port Gamble | Zone 8a: 10°F to 15°F |
| Port Hadlock | Zone 9a: 20°F to 25°F |
| Port Hadlock-Irondale | Zone 9a: 20°F to 25°F |
| Port Ludlow | Zone 9a: 20°F to 25°F |
| Port Orchard | Zone 8a: 10°F to 15°F |
| Port Townsend | Zone 9a: 20°F to 25°F |
| Porter | Zone 8a: 10°F to 15°F |
| Poulsbo | Zone 8a: 10°F to 15°F |
| Prairie Ridge | Zone 8a: 10°F to 15°F |
| Prescott | Zone 6b: -5°F to 0°F |
| Preston | Zone 8a: 10°F to 15°F |
| Priest Point | Zone 8a: 10°F to 15°F |
| Prosser | Zone 7a: 0°F to 5°F |
| Pullman | Zone 6a: -10°F to -5°F |
| Purdy | Zone 8a: 10°F to 15°F |
| Puyallup | Zone 8a: 10°F to 15°F |
| Pysht | Zone 8a: 10°F to 15°F |
| Queets | Zone 8a: 10°F to 15°F |
| Quilcene | Zone 8a: 10°F to 15°F |
| Quillayute | Zone 8a: 10°F to 15°F |
| Quinault | Zone 8a: 10°F to 15°F |
| Quincy | Zone 6a: -10°F to -5°F |
| Rainier | Zone 8a: 10°F to 15°F |
| Randle | Zone 7b: 5°F to 10°F |
| Ravensdale | Zone 8a: 10°F to 15°F |
| Raymond | Zone 8b: 15°F to 20°F |
| Reardan | Zone 5b: -15°F to -10°F |
| Redmond | Zone 8a: 10°F to 15°F |
| Redondo | Zone 8a: 10°F to 15°F |
| Renton | Zone 8a: 10°F to 15°F |
| Republic | Zone 5a: -20°F to -15°F |
| Retsil | Zone 8a: 10°F to 15°F |
| Rice | Zone 5b: -15°F to -10°F |
| Richland | Zone 7a: 0°F to 5°F |
| Richmond Highlands | Zone 8a: 10°F to 15°F |
| Ridgefield | Zone 8a: 10°F to 15°F |
| Ritzville | Zone 6a: -10°F to -5°F |
| River Road | Zone 8a: 10°F to 15°F |
| Riverbend | Zone 8a: 10°F to 15°F |
| Riverside | Zone 5b: -15°F to -10°F |
| Riverton | Zone 8a: 10°F to 15°F |
| Robe | Zone 8a: 10°F to 15°F |
| Roche Harbor | Zone 8a: 10°F to 15°F |
| Rochester | Zone 8a: 10°F to 15°F |
| Rock Island | Zone 6a: -10°F to -5°F |
| Rockford | Zone 6a: -10°F to -5°F |
| Rockport | Zone 7a: 0°F to 5°F |
| Rocky Point | Zone 8a: 10°F to 15°F |
| Rollingbay | Zone 8a: 10°F to 15°F |
| Ronald | Zone 5b: -15°F to -10°F |
| Roosevelt | Zone 7a: 0°F to 5°F |
| Rosalia | Zone 6a: -10°F to -5°F |
| Rosburg | Zone 8b: 15°F to 20°F |
| Rosedale | Zone 8a: 10°F to 15°F |
| Roslyn | Zone 5b: -15°F to -10°F |
| Roy | Zone 8a: 10°F to 15°F |
| Royal City | Zone 6b: -5°F to 0°F |
| Ruston | Zone 8a: 10°F to 15°F |
| Ryderwood | Zone 8a: 10°F to 15°F |
| Sahalee | Zone 8a: 10°F to 15°F |
| Saint John | Zone 6a: -10°F to -5°F |
| Salkum | Zone 8a: 10°F to 15°F |
| Salmon Creek | Zone 8a: 10°F to 15°F |
| Sammamish | Zone 8a: 10°F to 15°F |
| Sappho | Zone 8a: 10°F to 15°F |
| Satsop | Zone 8a: 10°F to 15°F |
| Satus | Zone 7a: 0°F to 5°F |
| Seabeck | Zone 8a: 10°F to 15°F |
| Seahurst | Zone 8a: 10°F to 15°F |
| SeaTac | Zone 8a: 10°F to 15°F |
| Seattle | Zone 8a: 10°F to 15°F |
| Seattle/Boeing Field | Zone 8a: 10°F to 15°F |
| Seaview | Zone 8b: 15°F to 20°F |
| Sedro-Woolley | Zone 8a: 10°F to 15°F |
| Seguim | Zone 8a: 10°F to 15°F |
| Sekiu | Zone 8a: 10°F to 15°F |
| Selah | Zone 6b: -5°F to 0°F |
| Sequim | Zone 8a: 10°F to 15°F |
| Shaker Church | Zone 8a: 10°F to 15°F |
| Shaw Island | Zone 8a: 10°F to 15°F |
| Shelter Bay | Zone 8a: 10°F to 15°F |
| Shelton | Zone 8a: 10°F to 15°F |
| Sheridan Beach | Zone 8a: 10°F to 15°F |
| Shoreline | Zone 8a: 10°F to 15°F |
| Silvana | Zone 8a: 10°F to 15°F |
| Silver Creek | Zone 8a: 10°F to 15°F |
| Silver Firs | Zone 8a: 10°F to 15°F |
| Silver Lake | Zone 8a: 10°F to 15°F |
| Silverdale | Zone 8a: 10°F to 15°F |
| Sisco Heights | Zone 8a: 10°F to 15°F |
| Skamania | Zone 8b: 15°F to 20°F |
| Skamokawa | Zone 8b: 15°F to 20°F |
| Ski Bluewood | Zone 6a: -10°F to -5°F |
| Skokomish | Zone 8a: 10°F to 15°F |
| Skykomish | Zone 7a: 0°F to 5°F |
| Smokey Point | Zone 8a: 10°F to 15°F |
| Snee Oosh | Zone 8a: 10°F to 15°F |
| Snohomish | Zone 8a: 10°F to 15°F |
| Snoqualmie | Zone 8a: 10°F to 15°F |
| Snoqualmie Pass | Zone 7a: 0°F to 5°F |
| Soap Lake | Zone 6a: -10°F to -5°F |
| South Bend | Zone 8b: 15°F to 20°F |
| South Broadway | Zone 6b: -5°F to 0°F |
| South Cle Elum | Zone 5b: -15°F to -10°F |
| South Colby | Zone 8a: 10°F to 15°F |
| South Hill | Zone 8a: 10°F to 15°F |
| South Prairie | Zone 8a: 10°F to 15°F |
| South Wenatchee | Zone 6a: -10°F to -5°F |
| Southworth | Zone 8a: 10°F to 15°F |
| Spanaway | Zone 8a: 10°F to 15°F |
| Spangle | Zone 6a: -10°F to -5°F |
| Spokane | Zone 5b: -15°F to -10°F |
| Spokane Valley | Zone 6a: -10°F to -5°F |
| Spokane/Fairchild AFB | Zone 5b: -15°F to -10°F |
| Spokane/Felts Field | Zone 5b: -15°F to -10°F |
| Sprague | Zone 5b: -15°F to -10°F |
| Springdale | Zone 5b: -15°F to -10°F |
| Stampede Pass | Zone 6b: -5°F to 0°F |
| Stanwood | Zone 8a: 10°F to 15°F |
| Starbuck | Zone 6b: -5°F to 0°F |
| Startup | Zone 8a: 10°F to 15°F |
| Stehekin | Zone 6a: -10°F to -5°F |
| Steilacoom | Zone 8a: 10°F to 15°F |
| Steptoe | Zone 6a: -10°F to -5°F |
| Stevenson | Zone 8b: 15°F to 20°F |
| Stimson Crossing | Zone 8a: 10°F to 15°F |
| Stratford | Zone 6a: -10°F to -5°F |
| Sudden Valley | Zone 8a: 10°F to 15°F |
| Sultan | Zone 8a: 10°F to 15°F |
| Sumas | Zone 8a: 10°F to 15°F |
| Summit | Zone 8a: 10°F to 15°F |
| Summitview | Zone 6b: -5°F to 0°F |
| Sumner | Zone 8a: 10°F to 15°F |
| Sunnyside | Zone 6b: -5°F to 0°F |
| Sunnyslope | Zone 6a: -10°F to -5°F |
| Suquamish | Zone 8a: 10°F to 15°F |
| Swede Heaven | Zone 7b: 5°F to 10°F |
| Swinomish Village | Zone 8a: 10°F to 15°F |
| Tacoma | Zone 8a: 10°F to 15°F |
| Tacoma/McChord AFB | Zone 8a: 10°F to 15°F |
| Taholah | Zone 8a: 10°F to 15°F |
| Tahuya | Zone 8a: 10°F to 15°F |
| Tampico | Zone 6a: -10°F to -5°F |
| Tanglewilde-Thompson Place | Zone 7b: 5°F to 10°F |
| Tanner | Zone 8a: 10°F to 15°F |
| Tekoa | Zone 6a: -10°F to -5°F |
| Tenino | Zone 8a: 10°F to 15°F |
| Terrace Heights | Zone 6b: -5°F to 0°F |
| Thornton | Zone 6a: -10°F to -5°F |
| Thorp | Zone 6a: -10°F to -5°F |
| Three Lakes | Zone 8a: 10°F to 15°F |
| Tieton | Zone 6b: -5°F to 0°F |
| Timentwa | Zone 5b: -15°F to -10°F |
| Tokeland | Zone 8b: 15°F to 20°F |
| Toledo | Zone 8a: 10°F to 15°F |
| Tonasket | Zone 5a: -20°F to -15°F |
| Toppenish | Zone 6b: -5°F to 0°F |
| Torboy | Zone 5a: -20°F to -15°F |
| Touchet | Zone 6b: -5°F to 0°F |
| Toutle | Zone 8a: 10°F to 15°F |
| Town and Country | Zone 5b: -15°F to -10°F |
| Tracyton | Zone 8a: 10°F to 15°F |
| Trentwood | Zone 6a: -10°F to -5°F |
| Tri-Cities | Zone 7a: 0°F to 5°F |
| Trout Lake | Zone 6b: -5°F to 0°F |
| Tukwila | Zone 8a: 10°F to 15°F |
| Tulalip | Zone 8a: 10°F to 15°F |
| Tulalip Bay | Zone 8a: 10°F to 15°F |
| Tumtum | Zone 5b: -15°F to -10°F |
| Tumwater | Zone 7b: 5°F to 10°F |
| Twisp | Zone 5b: -15°F to -10°F |
| Tyee | Zone 8a: 10°F to 15°F |
| Underwood | Zone 7b: 5°F to 10°F |
| Union | Zone 8a: 10°F to 15°F |
| Union Gap | Zone 6b: -5°F to 0°F |
| Union Hill-Novelty Hill | Zone 8a: 10°F to 15°F |
| Uniontown | Zone 6b: -5°F to 0°F |
| University Place | Zone 8a: 10°F to 15°F |
| Usk | Zone 5b: -15°F to -10°F |
| Vader | Zone 8a: 10°F to 15°F |
| Valley | Zone 5a: -20°F to -15°F |
| Valleyford | Zone 6a: -10°F to -5°F |
| Van Zandt | Zone 8a: 10°F to 15°F |
| Vancouver | Zone 8b: 15°F to 20°F |
| Vantage | Zone 6b: -5°F to 0°F |
| Vashon | Zone 8a: 10°F to 15°F |
| Vaughn | Zone 8a: 10°F to 15°F |
| Venersborg | Zone 8a: 10°F to 15°F |
| Veradale | Zone 6a: -10°F to -5°F |
| Verlot | Zone 8a: 10°F to 15°F |
| Wahkiacus | Zone 6b: -5°F to 0°F |
| Waitsburg | Zone 6b: -5°F to 0°F |
| Waldron | Zone 8a: 10°F to 15°F |
| Walla Walla | Zone 6b: -5°F to 0°F |
| Walla Walla East | Zone 6b: -5°F to 0°F |
| Waller | Zone 8a: 10°F to 15°F |
| Wallula | Zone 6b: -5°F to 0°F |
| Walnut Grove | Zone 8a: 10°F to 15°F |
| Wapato | Zone 6b: -5°F to 0°F |
| Warden | Zone 6a: -10°F to -5°F |
| Warm Beach | Zone 8a: 10°F to 15°F |
| Washougal | Zone 8b: 15°F to 20°F |
| Washtucna | Zone 6a: -10°F to -5°F |
| Waterville | Zone 6a: -10°F to -5°F |
| Wauconda | Zone 5a: -20°F to -15°F |
| Wauna | Zone 8a: 10°F to 15°F |
| Waverly | Zone 6a: -10°F to -5°F |
| Weallup Lake | Zone 8a: 10°F to 15°F |
| Wellpinit | Zone 5b: -15°F to -10°F |
| Wenatchee | Zone 6a: -10°F to -5°F |
| Wesport | Zone 8b: 15°F to 20°F |
| West Clarkston-Highland | Zone 6a: -10°F to -5°F |
| West Lake Sammamish | Zone 8a: 10°F to 15°F |
| West Lake Stevens | Zone 8a: 10°F to 15°F |
| West Longview | Zone 8b: 15°F to 20°F |
| West Pasco | Zone 7a: 0°F to 5°F |
| West Richland | Zone 7a: 0°F to 5°F |
| West Side Highway | Zone 8b: 15°F to 20°F |
| West Sound | Zone 8a: 10°F to 15°F |
| West Valley | Zone 6b: -5°F to 0°F |
| West Wenatchee | Zone 6a: -10°F to -5°F |
| Westport | Zone 8b: 15°F to 20°F |
| Whidbey Island | Zone 8a: 10°F to 15°F |
| White Center | Zone 8a: 10°F to 15°F |
| White Salmon | Zone 7b: 5°F to 10°F |
| White Swan | Zone 6a: -10°F to -5°F |
| Wilbur | Zone 6a: -10°F to -5°F |
| Wilkeson | Zone 8a: 10°F to 15°F |
| Willapa | Zone 8b: 15°F to 20°F |
| Wilson Creek | Zone 6a: -10°F to -5°F |
| Winlock | Zone 8a: 10°F to 15°F |
| Winslow | Zone 8a: 10°F to 15°F |
| Winthrop | Zone 6a: -10°F to -5°F |
| Wishram | Zone 7a: 0°F to 5°F |
| Wollochet | Zone 8a: 10°F to 15°F |
| Woodinville | Zone 8a: 10°F to 15°F |
| Woodland | Zone 8a: 10°F to 15°F |
| Woodmont Beach | Zone 8a: 10°F to 15°F |
| Woods Creek | Zone 8a: 10°F to 15°F |
| Woodway | Zone 8a: 10°F to 15°F |
| Yacolt | Zone 8a: 10°F to 15°F |
| Yakima | Zone 6b: -5°F to 0°F |
| Yarrow Point | Zone 8a: 10°F to 15°F |
| Yelm | Zone 8a: 10°F to 15°F |
| Zillah | Zone 6b: -5°F to 0°F |