Fairfield, CA Frost Dates
The last spring frost in Fairfield usually comes around January 15 and the first fall frost around December 14.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | January 15 | December 14 |
| Hard freeze, 28°F | December 31 | December 24 |
Growing season: about 336 days.
Frequently asked questions
When is the last frost in Fairfield, CA?
The median date of the last spring frost (32°F) is January 15. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past January 15 lowers the risk for tender plants.
When is the first frost in Fairfield?
The median date of the first fall frost (32°F) is December 14, and a hard freeze (28°F) usually follows around December 24.
How long is the growing season in Fairfield?
About 336 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USC00042934. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.