Frost dates in Costilla County, Colorado
The average last spring frost in Costilla County falls May 25 to May 31 and the average first fall frost Sep 21 to Sep 23, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Blanca, Fort Garland, San Luis, Sanford. 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 |
|---|---|---|---|---|
| 81123 | Blanca | May 25 | Sep 22 | 5a |
| 81126 | May 31 | Sep 23 | 5b | |
| 81133 | Fort Garland | May 25 | Sep 22 | 5b |
| 81138 | May 31 | Sep 23 | 5a | |
| 81151 | Sanford | May 28 | Sep 21 | 5a |
| 81152 | San Luis | May 31 | Sep 23 | 5b |
Nearby counties
Alamosa County Conejos County Huerfano County Rio Grande County Custer County Las Animas County
All Colorado counties · Download Colorado frost dates (CSV)
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