San Bernardino, CA Frost Dates
The last spring frost in San Bernardino usually comes around January 27 and the first fall frost around December 19.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | January 27 | December 19 |
| Hard freeze, 28°F | January 7 | January 1 |
Growing season: about 329 days.
Frequently asked questions
When is the last frost in San Bernardino, CA?
The median date of the last spring frost (32°F) is January 27. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past January 27 lowers the risk for tender plants.
When is the first frost in San Bernardino?
The median date of the first fall frost (32°F) is December 19, and a hard freeze (28°F) usually follows around January 1.
How long is the growing season in San Bernardino?
About 329 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USC00047306. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.
San Bernardino weather by month · Frost dates for every city