Frost dates in Okanogan County, Washington
The average last spring frost in Okanogan County falls Apr 21 to May 30 and the average first fall frost Sep 10 to Oct 21, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6a to 7b. Places: Brewster, Conconully, Coulee Dam, Elmer City, Loomis, Methow. 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 |
|---|---|---|---|---|
| 98812 | Brewster | Apr 21 | Oct 15 | 7a |
| 98814 | Apr 21 | Oct 15 | 6b | |
| 98819 | Conconully | Apr 30 | Oct 7 | 6b |
| 98827 | Loomis | Apr 26 | Oct 10 | 6a |
| 98829 | Apr 21 | Oct 15 | 6b | |
| 98833 | May 9 | Sep 29 | 6a | |
| 98834 | Methow | Apr 21 | Oct 15 | 7a |
| 98840 | Okanogan | Apr 30 | Oct 7 | 7a |
| 98841 | North Omak | Apr 30 | Oct 7 | 6b |
| 98844 | Oroville | Apr 26 | Oct 10 | 6a |
| 98846 | Pateros | Apr 21 | Oct 15 | 7a |
| 98849 | Riverside | Apr 30 | Oct 7 | 6b |
| 98855 | Tonasket | Apr 26 | Oct 10 | 6b |
| 98856 | Twisp | May 15 | Sep 22 | 6b |
| 98859 | May 30 | Sep 10 | 6a | |
| 98862 | Winthrop | May 15 | Sep 22 | 6b |
| 99116 | Coulee Dam | Apr 22 | Oct 21 | 7a |
| 99124 | Elmer City | Apr 22 | Oct 21 | 7b |
| 99155 | Nespelem Community | Apr 22 | Oct 21 | 6b |
Nearby counties
Douglas County Ferry County Chelan County Stevens County Grant County Lincoln County
All Washington counties · Download Washington frost dates (CSV)
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