Fairfax, CA 94914 Frost Dates
Frost dates for Fairfax, CA, ZIP 94914
Typically, the last spring freeze lands around 01/11, roughly 136 days out. The first fall frost typically arrives around 12/21, about 349 frost-free days later.
Fairfax 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.
What to do before the first frost
Zone 9b around Fairfax has about 16 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Fairfax's last frost
01/11 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 12/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fairfax compares
At roughly 349 frost-free days, Fairfax places 2,348 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,054 of 2,555.
Learn more
zone vs. frost date explains why Zone 9b and Fairfax's frost date answer different questions, and the frost range explains how to read the range around Fairfax's dates instead of trusting one.