Frost dates in Summit County, Colorado
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The average last spring frost in Summit County falls Jun 6 to Jun 21 and the average first fall frost Sep 7 to Sep 19, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Breckenridge, Copper Mountain, Keystone, Silverthorne. 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 |
|---|---|---|---|---|
| 80424 | Breckenridge | Jun 16 | Sep 9 | 5a |
| 80435 | Keystone | Jun 6 | Sep 19 | 5a |
| 80443 | Copper Mountain | Jun 21 | Sep 7 | 5a |
| 80498 | Silverthorne | Jun 21 | Sep 7 | 5a |
Nearby counties
Clear Creek County Eagle County Lake County Park County Grand County Gilpin County
All Colorado counties · Download Colorado frost dates (CSV)
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