Folsom, CA 95630 Frost Dates
Folsom, CA: when does the frost end?
The last spring frost here typically falls around 01/12, about 137 days from today. Fall's first freeze usually shows up around 12/16, roughly 341 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Folsom 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 16 weeks until Folsom's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Folsom's last frost
01/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/18 and only about 1 year in 10 sees frost after that.
Folsom against the rest of the dataset
At roughly 341 frost-free days, Folsom places 2,584 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,141 of 2,555.
Learn more
Before leaning on 95630's figures: the frost range explains how to read the range around Folsom's dates instead of trusting one, while local microclimates explains what one yard in Folsom can differ from the 95630 normal.