Frost dates · Ohio
Ohio frost dates, county by county.
Last spring frost and first fall frost probability data for all 88 counties in Ohio, 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 Ohio
26 days separate the earliest and latest counties.
The median last spring frost in Erie County is April 1 — 26 days earlier than Mahoning County at April 27. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Ohio 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
88 counties · click any county for full frost data