San Jose, CA 95119 Frost Dates
San Jose, CA: when does the frost end?
The last spring frost here typically falls around 02/02, about 158 days from today. Fall's first freeze usually shows up around 12/06, roughly 310 days after the last spring frost.
San Jose sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 14 weeks until San Jose's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/02 isn't a guarantee
02/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
San Jose against the rest of the dataset
San Jose's growing season runs about 310 days, ranking 3,545 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,467 of 2,555.
Learn more
Before leaning on 95119's figures: the frost range explains how to read the range around San Jose's dates instead of trusting one, while local microclimates explains what one yard in San Jose can differ from the 95119 normal.