Bield:Farm
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.

By geography

Utah counties on the map.

Each dot is a county. Click for full frost-date detail. Color shows last-spring-frost timing — sage = earliest, amber = latest.

ListMap
Summit County · Spring Jun 19 · Fall Sep 9 · 82-day seasonSan Juan County · Spring Apr 24 · Fall Oct 23 · 182-day seasonDaggett County · Spring May 10 · Fall Oct 3 · 146-day seasonMorgan County · Spring May 8 · Fall Oct 4 · 149-day seasonCache County · Spring Apr 15 · Fall Oct 27 · 195-day seasonDavis County · Spring Apr 1 · Fall Nov 1 · 214-day seasonPiute County · Spring May 8 · Fall Oct 3 · 148-day seasonUtah County · Spring Apr 9 · Fall Oct 30 · 204-day seasonSanpete County · Spring May 12 · Fall Sep 29 · 140-day seasonWayne County · Spring Mar 31 · Fall Nov 7 · 221-day seasonEmery County · Spring May 4 · Fall Oct 5 · 154-day seasonGarfield County · Spring Apr 23 · Fall Oct 23 · 183-day seasonBeaver County · Spring Apr 28 · Fall Oct 12 · 167-day seasonIron County · Spring May 6 · Fall Oct 9 · 156-day seasonBox Elder County · Spring May 3 · Fall Oct 12 · 162-day seasonUintah County · Spring Apr 19 · Fall Oct 13 · 177-day seasonWashington County · Spring Mar 18 · Fall Nov 16 · 243-day seasonDuchesne County · Spring Apr 22 · Fall Oct 16 · 177-day seasonJuab County · Spring May 2 · Fall Oct 10 · 161-day seasonMillard County · Spring May 7 · Fall Oct 5 · 151-day seasonSevier County · Spring May 7 · Fall Oct 4 · 150-day seasonTooele County · Spring Apr 28 · Fall Oct 12 · 167-day seasonCarbon County · Spring Apr 22 · Fall Oct 22 · 183-day seasonGrand County · Spring Apr 8 · Fall Oct 30 · 205-day seasonRich County · Spring May 30 · Fall Sep 11 · 104-day seasonWasatch County · Spring May 17 · Fall Oct 1 · 137-day seasonSalt Lake County · Spring Mar 8 · Fall Nov 18 · 255-day seasonWeber County · Spring May 4 · Fall Oct 6 · 155-day seasonKane County · Spring Apr 3 · Fall Nov 2 · 213-day season
Last spring frostEarliestMedianLatest
29 counties · click any county for full frost data
Alphabetical

All Utah counties — A to Z.

Frost dates set the calendar. Bield: Farm runs it.

Pair these dates with live forecasts for your specific farm location. Bield: Farm logs your soil tests, planting dates, weather, and yield outcomes year over year.

Download Bield: Farm