Folsom, CA 95762 Frost Dates
Folsom, CA: when does the frost end?
Typically, the last spring freeze lands around 03/31, roughly 215 days out. Fall's first freeze usually shows up around 11/21, roughly 237 days after the last spring frost.
Folsom 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 12 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
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Folsom against the rest of the dataset
About 237 days separate Folsom's last and first frost, putting it 9,066 of 40,283 ZIP codes nationally. Within CA, it ranks 2,129 of 2,555.
Learn more
Before leaning on 95762's figures: local microclimates explains what one yard in Folsom can differ from the 95762 normal, while zone vs. frost date explains why Zone 9b and Folsom's frost date answer different questions.