Fairfax, CA 94976 Frost Dates
Frost dates for Fairfax, CA, ZIP 94976
Around 01/11 is the usual last spring frost, about 136 days away. The first fall frost typically arrives around 12/21, about 349 frost-free days later.
The USDA Plant Hardiness Zone Map puts Fairfax in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 10a 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.
How much risk comes with planting early here
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 2,360 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,066 of 2,555.
Learn more
the frost range explains how to read the range around Fairfax's dates instead of trusting one, and local microclimates explains what one yard in Fairfax can differ from the 94976 normal.