Frost dates · California

California frost dates,
county by county.

Last spring frost and first fall frost probability data for all 58 counties in California, 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 California

999 days separate the earliest and latest counties.

The median last spring frost in Solano County is December 31 — 999 days earlier than Los Angeles 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.

List Map

Alphabetical

All California counties — A to Z.

Frost dates set the calendar. Bield: Farm runs it.

Pair these dates with live forecasts for your specific farm location. Bield: Farm logs your soil tests, planting dates, weather, and yield outcomes year over year.

Download Bield: Farm

California frost dates,county by county.

999 days separate the earliest and latest counties.

Counties sorted by last spring frost.

All California counties — A to Z.

Frost dates set the calendar. Bield: Farm runs it.

California frost dates,
county by county.