Campbell, CA 95118 Frost Dates
Frost dates for Campbell, CA, ZIP 95118
Typically, the last spring freeze lands around 02/02, roughly 158 days out. The first fall frost typically arrives around 12/06, about 310 frost-free days later.
The USDA Plant Hardiness Zone Map puts Campbell in Zone 9b (25 to 30°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 9b around Campbell has about 14 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 Campbell's last frost
02/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 12/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Campbell compares
At roughly 310 frost-free days, Campbell places 3,558 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,474 of 2,555.
Learn more
the frost range explains how to read the range around Campbell's dates instead of trusting one, and local microclimates explains what one yard in Campbell can differ from the 95118 normal.