Frost dates · Oklahoma
Oklahoma frost dates, county by county.
Last spring frost and first fall frost probability data for all 77 counties in Oklahoma, 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 Oklahoma
44 days separate the earliest and latest counties.
The median last spring frost in Choctaw County is March 2 — 44 days earlier than Cimarron County at April 15. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Oklahoma 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
77 counties · click any county for full frost data