Sebastopol, CA 94926 Frost Dates
When can you plant in Sebastopol, CA?
Around 01/29 is the usual last spring frost, about 154 days away. The first fall frost typically arrives around 12/30, about 347 frost-free days later.
Sebastopol sits in USDA Zone 9a (20 to 25°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 18 weeks of growing season left in Sebastopol before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Sebastopol's last frost
01/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/17 and you're betting against frost in roughly 9 years out of 10. 12/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sebastopol compares
About 347 days separate Sebastopol's last and first frost, putting it 2,400 of 40,283 ZIP codes nationally. Within CA, it ranks 1,087 of 2,555.
Learn more
local microclimates covers what one yard in Sebastopol can differ from the 94926 normal. zone vs. frost date covers why Zone 9a and Sebastopol's frost date answer different questions.