Campbell, CA 95125 Frost Dates
Frost dates for Campbell, CA, ZIP 95125
Typically, the last spring freeze lands around 01/02, roughly 127 days out. The first fall frost typically arrives around 12/25, about 362 frost-free days later.
Campbell 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 Campbell has about 17 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
01/02 is the middle of 30 years of NOAA records, not a promise. Plant by 01/23 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 Campbell compares
Campbell's growing season runs about 362 days, ranking 2,066 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 952 of 2,555.
Learn more
zone vs. frost date explains why Zone 9b and Campbell's frost date answer different questions, and the frost range explains how to read the range around Campbell's dates instead of trusting one.