Frost dates · Indiana
Indiana frost dates, county by county.
Last spring frost and first fall frost probability data for all 92 counties in Indiana, 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 Indiana
35 days separate the earliest and latest counties.
The median last spring frost in Vanderburgh County is March 18 — 35 days earlier than DeKalb County at April 22. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Indiana 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
92 counties · click any county for full frost data