Frost dates · Michigan
Michigan frost dates, county by county.
Last spring frost and first fall frost probability data for all 83 counties in Michigan, 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 Michigan
49 days separate the earliest and latest counties.
The median last spring frost in Van Buren County is April 5 — 49 days earlier than Iron County at May 24. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Michigan counties on the map.
Each polygon is a county. Click for full frost-date detail. Color shows last-spring-frost timing — sage = earliest, amber = latest.
MapList
Last spring frostEarliestMedianLatest
83 counties · click any county for full frost data