Frost dates across Washington
Typical last spring frost, first fall frost, and USDA zone for 14 Washington cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
Not on the list? Any Washington ZIP works.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Seattle | Mar 13 | Nov 17 | about 249 days | 9a |
| Spokane | Apr 26 | Oct 12 | about 169 days | 7a |
| Tacoma | Mar 8 | Nov 14 | about 251 days | 8b |
| Vancouver | Mar 29 | Nov 9 | about 225 days | 8b |
| Bellevue | Mar 8 | Nov 23 | about 260 days | 9a |
| Kent | Mar 20 | Nov 10 | about 235 days | 8b |
| Yakima | Apr 8 | Oct 23 | about 198 days | 7a |
| Bellingham | Apr 1 | Nov 2 | about 215 days | 8b |
| Kennewick | Mar 28 | Oct 30 | about 216 days | 7b |
| Wenatchee | Apr 4 | Oct 28 | about 207 days | 7a |
| Pullman | May 6 | Sep 29 | about 146 days | 6b |
| Moses Lake | Apr 27 | Oct 8 | about 164 days | 7a |
| Port Angeles | Mar 12 | Nov 19 | about 252 days | 8b |
| Aberdeen | Mar 29 | Nov 15 | about 231 days | 8b |
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