Folsom, LA 70442 Frost Dates
When can you plant in Folsom, LA?
Typically, the last spring freeze lands around 03/07, roughly 191 days out. The first fall frost typically arrives around 11/18, about 257 frost-free days later.
Folsom sits in USDA Zone 9a (20 to 25°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.
What to do before the first frost
About 12 weeks of growing season left in Folsom before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/07 isn't a guarantee
03/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/10 and you're betting against frost in roughly 9 years out of 10. 03/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Folsom compares
About 257 days separate Folsom's last and first frost, putting it 6,735 of 40,283 ZIP codes nationally. Within LA, it ranks 529 of 710.
Learn more
zone vs. frost date covers why Zone 9a and Folsom's frost date answer different questions. the frost range covers how to read the range around Folsom's dates instead of trusting one.