Frost dates · Utah
Utah frost dates,
county by county.
Last spring frost and first fall frost probability data for all 29 counties in Utah, 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 Utah
103 days separate the earliest and latest counties.
The median last spring frost in Salt Lake County is March 8 — 103 days earlier than Summit County at June 19. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
Alphabetical
All Utah counties — A to Z.
- Beaver County
- Box Elder County
- Cache County
- Carbon County
- Daggett County
- Davis County
- Duchesne County
- Emery County
- Garfield County
- Grand County
- Iron County
- Juab County
- Kane County
- Millard County
- Morgan County
- Piute County
- Rich County
- Salt Lake County
- San Juan County
- Sanpete County
- Sevier County
- Summit County
- Tooele County
- Uintah County
- Utah County
- Wasatch County
- Washington County
- Wayne County
- Weber County