Frost dates in Walla Walla County, Washington
The average last spring frost in Walla Walla County falls Mar 27 to May 2 and the average first fall frost Oct 1 to Oct 31, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 7a to 7b. Places: Burbank, College Place, Dixie, Prescott, Touchet, Waitsburg. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 99323 | Burbank | Apr 7 | Oct 22 | 7a |
| 99324 | College Place | May 2 | Oct 1 | 7a |
| 99329 | Dixie | Mar 27 | Oct 31 | 7a |
| 99348 | Prescott | Apr 28 | Oct 13 | 7a |
| 99360 | Touchet | May 2 | Oct 1 | 7a |
| 99361 | Waitsburg | Apr 28 | Oct 13 | 7a |
| 99362 | Walla Walla | Mar 27 | Oct 31 | 7a |
| 99363 | Wallula | Apr 7 | Oct 22 | 7b |
Nearby counties
Columbia County Franklin County Benton County Garfield County Adams County Asotin County
All Washington counties · Download Washington frost dates (CSV)
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