Frost dates · Colorado
Colorado frost dates,
county by county.
Last spring frost and first fall frost probability data for all 64 counties in Colorado, computed from the NOAA 1991–2020 Climate Normals. Every county page surfaces the full probability table at three temperature thresholds plus crop-specific planting guidance.
Variation across Colorado
901 days separate the earliest and latest counties.
The median last spring frost in Mesa County is April 8 — 901 days earlier than Jackson County at —. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
Alphabetical
All Colorado counties — A to Z.
- Adams County
- Alamosa County
- Arapahoe County
- Archuleta County
- Baca County
- Bent County
- Boulder County
- Broomfield County
- Chaffee County
- Cheyenne County
- Clear Creek County
- Conejos County
- Costilla County
- Crowley County
- Custer County
- Delta County
- Denver County
- Dolores County
- Douglas County
- Eagle County
- El Paso County
- Elbert County
- Fremont County
- Garfield County
- Gilpin County
- Grand County
- Gunnison County
- Hinsdale County
- Huerfano County
- Jackson County
- Jefferson County
- Kiowa County
- Kit Carson County
- La Plata County
- Lake County
- Larimer County
- Las Animas County
- Lincoln County
- Logan County
- Mesa County
- Mineral County
- Moffat County
- Montezuma County
- Montrose County
- Morgan County
- Otero County
- Ouray County
- Park County
- Phillips County
- Pitkin County
- Prowers County
- Pueblo County
- Rio Blanco County
- Rio Grande County
- Routt County
- Saguache County
- San Juan County
- San Miguel County
- Sedgwick County
- Summit County
- Teller County
- Washington County
- Weld County
- Yuma County