Campbell, CA 95008 Frost Dates
When can you plant in Campbell, CA?
The last spring frost here typically falls around 02/02, about 158 days from today. The first fall frost typically arrives around 12/06, about 310 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
About 14 weeks of growing season left in Campbell before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
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
Campbell's growing season runs about 310 days, ranking 3,557 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,473 of 2,555.
Learn more
local microclimates covers what one yard in Campbell can differ from the 95008 normal. zone vs. frost date covers why Zone 9b and Campbell's frost date answer different questions.