Santa Clara, CA 95051 Frost Dates
Santa Clara, CA: when does the frost end?
Typically, the last spring freeze lands around 01/12, roughly 137 days out. Fall's first freeze usually shows up around 12/22, roughly 347 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Santa Clara in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 17 weeks until Santa Clara's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/20 and only about 1 year in 10 sees frost after that.
Santa Clara against the rest of the dataset
At roughly 347 frost-free days, Santa Clara places 2,384 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,071 of 2,555.
Learn more
Before leaning on 95051's figures: the frost range explains how to read the range around Santa Clara's dates instead of trusting one, while local microclimates explains what one yard in Santa Clara can differ from the 95051 normal.