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
997 days separate the earliest and latest counties.
The median last spring frost in Curry County is January 2 — 997 days earlier than Deschutes County at —. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By frost timing
Counties sorted by last spring frost.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
- Deschutes CountySpring —·Fall —0-day season
- Klamath CountySpring Jun 10·Fall Sep 1395-day season
- Malheur CountySpring May 22·Fall Sep 21122-day season
- Wallowa CountySpring May 13·Fall Sep 22132-day season
- Crook CountySpring May 12·Fall Sep 30141-day season
- Lake CountySpring May 10·Fall Sep 28141-day season
- Baker CountySpring May 8·Fall Sep 27142-day season
- Grant CountySpring May 8·Fall Oct 1146-day season
- Harney CountySpring May 3·Fall Oct 1151-day season
- Jefferson CountySpring May 2·Fall Oct 17168-day season
- Wheeler CountySpring Apr 30·Fall Oct 22175-day season
- Sherman CountySpring Apr 26·Fall Oct 16173-day season
- Benton CountySpring Apr 25·Fall Oct 28186-day season
- Gilliam CountySpring Apr 25·Fall Oct 24182-day season
- Wasco CountySpring Apr 24·Fall Oct 24183-day season
- Hood River CountySpring Apr 21·Fall Oct 20182-day season
- Union CountySpring Apr 19·Fall Oct 14178-day season
- Columbia CountySpring Apr 12·Fall Oct 21192-day season
- Morrow CountySpring Apr 2·Fall Nov 1213-day season
- Umatilla CountySpring Mar 31·Fall Oct 24207-day season
- Linn CountySpring Mar 30·Fall Nov 5220-day season
- Marion CountySpring Mar 30·Fall Nov 13228-day season
- Washington CountySpring Mar 19·Fall Nov 11237-day season
- Polk CountySpring Mar 13·Fall Nov 23255-day season
- Jackson CountySpring Mar 10·Fall Nov 13248-day season
- Josephine CountySpring Mar 8·Fall Nov 16253-day season
- Clatsop CountySpring Feb 27·Fall Dec 4280-day season
- Clackamas CountySpring Feb 26·Fall Nov 30277-day season
- Douglas CountySpring Feb 26·Fall Dec 1278-day season
- Yamhill CountySpring Feb 20·Fall Nov 28281-day season
- Tillamook CountySpring Feb 19·Fall Dec 4288-day season
- Coos CountySpring Feb 16·Fall Dec 2289-day season
- Multnomah CountySpring Feb 14·Fall Dec 15304-day season
- Lane CountySpring Feb 2·Fall Dec 16317-day season
- Lincoln CountySpring Jan 20·Fall Dec 30344-day season
- Curry CountySpring Jan 2·Fall Dec 29361-day season
Alphabetical
All Oregon counties — A to Z.
- Baker County
- Benton County
- Clackamas County
- Clatsop County
- Columbia County
- Coos County
- Crook County
- Curry County
- Deschutes County
- Douglas County
- Gilliam County
- Grant County
- Harney County
- Hood River County
- Jackson County
- Jefferson County
- Josephine County
- Klamath County
- Lake County
- Lane County
- Lincoln County
- Linn County
- Malheur County
- Marion County
- Morrow County
- Multnomah County
- Polk County
- Sherman County
- Tillamook County
- Umatilla County
- Union County
- Wallowa County
- Wasco County
- Washington County
- Wheeler County
- Yamhill County