Folsom, CA 95672 Frost Dates
95672, near Folsom, CA: the frost window
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
Folsom's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
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 9,064 of 40,283 ZIP codes nationally. Within CA, it ranks 2,127 of 2,555.
Learn more
Two guides worth reading on 95672: zone vs. frost date, on why Zone 9b and Folsom's frost date answer different questions, and the frost range, on how to read the range around Folsom's dates instead of trusting one.