Frost dates · California
California counties by frost timing.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
Sorted by spring frost
Latest → earliest.
Modoc County
Spring May 11·Fall Sep 25137-day season
Mono County
Spring May 2·Fall Oct 21172-day season
Plumas County
Spring Apr 29·Fall Oct 9163-day season
Lassen County
Spring Apr 26·Fall Oct 21178-day season
Mariposa County
Spring Apr 26·Fall Nov 13201-day season
Alpine County
Spring Apr 24·Fall Oct 18177-day season
Sierra County
Spring Apr 23·Fall Nov 13204-day season
Nevada County
Spring Apr 16·Fall Nov 23221-day season
Tuolumne County
Spring Apr 16·Fall Nov 20218-day season
Siskiyou County
Spring Apr 12·Fall Nov 1203-day season
Santa Clara County
Spring Apr 10·Fall Dec 7241-day season
El Dorado County
Spring Apr 6·Fall Nov 22230-day season
Madera County
Spring Apr 5·Fall Nov 20229-day season
Mendocino County
Spring Mar 31·Fall Oct 30213-day season
Kern County
Spring Mar 28·Fall Dec 1248-day season
Trinity County
Spring Mar 17·Fall Nov 19247-day season
Lake County
Spring Mar 14·Fall Nov 21252-day season
Placer County
Spring Mar 13·Fall Dec 8270-day season
San Benito County
Spring Mar 12·Fall Nov 22255-day season
Glenn County
Spring Mar 1·Fall Nov 29273-day season
Santa Barbara County
Spring Feb 27·Fall Nov 27273-day season
Yuba County
Spring Feb 27·Fall Dec 1277-day season
Napa County
Spring Feb 18·Fall Dec 30315-day season
Ventura County
Spring Feb 17·Fall Dec 1287-day season
Merced County
Spring Feb 12·Fall Nov 29290-day season
Contra Costa County
Spring Feb 8·Fall Jan 16342-day season
San Diego County
Spring Jan 31·Fall Dec 19322-day season
San Bernardino County
Spring Jan 30·Fall Dec 8312-day season
Kings County
Spring Jan 24·Fall Dec 12322-day season
Sonoma County
Spring Jan 23·Fall Dec 5316-day season
Monterey County
Spring Jan 22·Fall Dec 6318-day season
Tulare County
Spring Jan 20·Fall Dec 14328-day season
Shasta County
Spring Jan 18·Fall Jan 4351-day season
Del Norte County
Spring Jan 17·Fall Dec 17334-day season
Riverside County
Spring Jan 15·Fall Dec 13332-day season
Tehama County
Spring Jan 13·Fall Dec 15336-day season
Sutter County
Spring Jan 12·Fall Dec 13335-day season
Alameda County
Spring Jan 10·Fall Dec 18342-day season
Amador County
Spring Jan 10·Fall Dec 27351-day season
San Joaquin County
Spring Jan 10·Fall Dec 16340-day season
Yolo County
Spring Jan 10·Fall Dec 18342-day season
San Luis Obispo County
Spring Jan 9·Fall Jan 6362-day season
Colusa County
Spring Jan 8·Fall Dec 15341-day season
Stanislaus County
Spring Jan 8·Fall Dec 21347-day season
Calaveras County
Spring Jan 6·Fall Dec 24352-day season
Butte County
Spring Jan 5·Fall Dec 31360-day season
San Mateo County
Spring Jan 5·Fall Dec 31360-day season
Fresno County
Spring Jan 4·Fall Dec 24354-day season
Humboldt County
Spring Jan 3·Fall Dec 25356-day season
Santa Cruz County
Spring Jan 3·Fall Dec 27358-day season
Imperial County
Spring Jan 2·Fall Dec 29361-day season
Inyo County
Spring Dec 31·Fall Dec 28362-day season
Marin County
Spring Dec 31·Fall Dec 29363-day season
Sacramento County
Spring Dec 31·Fall Dec 25359-day season
Solano County
Spring Dec 31·Fall Dec 24358-day season
Alphabetical · A to Z
- Alameda County
- Alpine County
- Amador County
- Butte County
- Calaveras County
- Colusa County
- Contra Costa County
- Del Norte County
- El Dorado County
- Fresno County
- Glenn County
- Humboldt County
- Imperial County
- Inyo County
- Kern County
- Kings County
- Lake County
- Lassen County
- Los Angeles County
- Madera County
- Marin County
- Mariposa County
- Mendocino County
- Merced County
- Modoc County
- Mono County
- Monterey County
- Napa County
- Nevada County
- Orange County
- Placer County
- Plumas County
- Riverside County
- Sacramento County
- San Benito County
- San Bernardino County
- San Diego County
- San Francisco County
- San Joaquin County
- San Luis Obispo County
- San Mateo County
- Santa Barbara County
- Santa Clara County
- Santa Cruz County
- Shasta County
- Sierra County
- Siskiyou County
- Solano County
- Sonoma County
- Stanislaus County
- Sutter County
- Tehama County
- Trinity County
- Tulare County
- Tuolumne County
- Ventura County
- Yolo County
- Yuba County