Frost dates in Jefferson County, Colorado
The average last spring frost in Jefferson County falls May 2 to Jun 16 and the average first fall frost Sep 8 to Oct 14, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b to 6a. Places: Arvada, Aspen Park, Coal Creek, Columbine, Dakota Ridge, Denver. 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 |
|---|---|---|---|---|
| 80002 | Arvada | May 5 | Oct 5 | 6a |
| 80003 | Arvada | May 5 | Oct 5 | 6a |
| 80004 | Arvada | May 5 | Oct 5 | 6a |
| 80005 | Arvada | May 5 | Oct 5 | 6a |
| 80007 | Arvada | May 3 | Oct 14 | 6a |
| 80021 | Westminster | May 2 | Oct 11 | 6a |
| 80033 | Wheat Ridge | May 5 | Oct 5 | 6a |
| 80123 | Columbine | May 2 | Oct 11 | 6a |
| 80127 | Dakota Ridge | May 8 | Oct 3 | 5b |
| 80128 | Columbine | May 2 | Oct 11 | 6a |
| 80214 | Lakewood | May 3 | Oct 7 | 6a |
| 80215 | Lakewood | May 3 | Oct 7 | 6a |
| 80226 | Lakewood | May 3 | Oct 7 | 6a |
| 80227 | Lakewood | May 2 | Oct 11 | 6a |
| 80228 | Lakewood | May 3 | Oct 7 | 6a |
| 80232 | Lakewood | May 3 | Oct 7 | 6a |
| 80235 | Denver | May 2 | Oct 11 | 6a |
| 80401 | Golden | May 3 | Oct 7 | 5b |
| 80403 | Coal Creek | May 3 | Oct 14 | 5b |
| 80419 | Golden | May 3 | Oct 7 | 6a |
| 80425 | May 16 | Sep 29 | 5b | |
| 80433 | Aspen Park | May 23 | Sep 22 | 5b |
| 80453 | Idledale | May 23 | Sep 22 | 5b |
| 80454 | Indian Hills | May 23 | Sep 22 | 5b |
| 80457 | Kittredge | May 23 | Sep 22 | 5b |
| 80465 | Morrison | May 23 | Sep 22 | 5b |
| 80470 | Jun 16 | Sep 8 | 5b |
Nearby counties
Denver County Broomfield County Arapahoe County Douglas County Adams County Gilpin County
All Colorado counties · Download Colorado frost dates (CSV)
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