San Jose, CA Frost Dates
The last spring frost in San Jose usually comes around January 12 and the first fall frost around December 22.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | January 12 | December 22 |
| Hard freeze, 28°F | December 31 | December 28 |
Growing season: about 347 days.
Frequently asked questions
When is the last frost in San Jose, CA?
The median date of the last spring frost (32°F) is January 12. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past January 12 lowers the risk for tender plants.
When is the first frost in San Jose?
The median date of the first fall frost (32°F) is December 22, and a hard freeze (28°F) usually follows around December 28.
How long is the growing season in San Jose?
About 347 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00023293. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.