Frost dates in Sonoma County, California
The average last spring frost in Sonoma County falls Jan 1 to Mar 20 and the average first fall frost Nov 13 to Dec 31, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 10a to 9b. Places: Bodega, Bodega Bay, Calistoga, Cazadero, Cloverdale, Cotati. 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 |
|---|---|---|---|---|
| 94515 | Calistoga | Mar 2 | Nov 23 | 9b |
| 94922 | Bodega | Mar 20 | Nov 13 | 9b |
| 94923 | Bodega Bay | Jan 1 | Dec 31 | 10a |
| 94928 | Rohnert Park | Feb 28 | Nov 25 | 9a |
| 94931 | Cotati | Feb 28 | Nov 25 | 9a |
| 94951 | Penngrove | Feb 28 | Nov 25 | 9b |
| 94954 | Petaluma | Feb 28 | Nov 25 | 9b |
| 94972 | Bodega | Jan 1 | Dec 31 | 9b |
| 95401 | Santa Rosa | Mar 2 | Nov 20 | 9a |
| 95403 | Santa Rosa | Mar 2 | Nov 20 | 9a |
| 95404 | Santa Rosa | Feb 25 | Dec 1 | 9b |
| 95405 | Santa Rosa | Feb 25 | Dec 1 | 9a |
| 95407 | Santa Rosa | Feb 25 | Dec 1 | 9a |
| 95409 | Santa Rosa | Feb 3 | Dec 4 | 9b |
| 95412 | Feb 26 | Dec 27 | 9b | |
| 95419 | Occidental | Mar 20 | Nov 13 | 9b |
| 95421 | Cazadero | Feb 26 | Dec 27 | 9b |
| 95425 | Cloverdale | Feb 25 | Dec 3 | 9b |
| 95430 | Jan 1 | Dec 31 | 9b | |
| 95431 | Mar 2 | Nov 27 | 9b | |
| 95436 | Forestville | Mar 20 | Nov 13 | 9b |
| 95439 | Fulton | Mar 2 | Nov 20 | 9a |
| 95441 | Geyserville | Feb 25 | Dec 3 | 9b |
| 95442 | Glen Ellen | Mar 2 | Nov 27 | 9b |
| 95444 | Graton | Mar 20 | Nov 13 | 9a |
| 95446 | Guerneville | Mar 20 | Nov 13 | 9b |
| 95448 | Healdsburg | Feb 15 | Dec 2 | 9b |
| 95450 | Timber Cove | Feb 26 | Dec 27 | 10a |
| 95452 | Kenwood | Feb 3 | Dec 4 | 9b |
| 95462 | Monte Rio | Mar 20 | Nov 13 | 9b |
| 95465 | Jan 1 | Dec 31 | 10a | |
| 95471 | Guerneville | Feb 15 | Dec 2 | 9b |
| 95472 | Occidental | Mar 20 | Nov 13 | 9a |
| 95476 | Sonoma | Mar 2 | Nov 27 | 9b |
| 95480 | Feb 26 | Dec 27 | 10a | |
| 95486 | Monte Rio | Mar 20 | Nov 13 | 9b |
| 95492 | Windsor | Mar 2 | Nov 20 | 9a |
| 95497 | Sea Ranch | Feb 26 | Dec 27 | 10a |
Nearby counties
Napa County Marin County Lake County Solano County San Francisco County Yolo County
All California counties · Download California frost dates (CSV)
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