Frost dates · Oregon
Oregon frost dates, county by county.
Last spring frost and first fall frost probability data for all 36 counties in Oregon, 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 Oregon
159 days separate the earliest and latest counties.
The median last spring frost in Curry County is January 2 — 159 days earlier than Klamath County at June 10. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Oregon 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
36 counties · click any county for full frost data