Frost dates in San Juan County, Colorado
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The average last spring frost in San Juan County falls Jun 15 and the average first fall frost Sep 11, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Silverton. 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 |
|---|---|---|---|---|
| 81433 | Silverton | Jun 15 | Sep 11 | 5a |
Nearby counties
Hinsdale County Ouray County Mineral County La Plata County San Miguel County Archuleta County
All Colorado counties · Download Colorado frost dates (CSV)
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