Sebastopol, CA 95419 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.
The USDA Plant Hardiness Zone Map puts Sebastopol 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
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.
How much risk comes with planting early here
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 2,408 of 40,283 ZIP codes nationally. Within CA, it ranks 1,095 of 2,555.
Learn more
zone vs. frost date covers why Zone 9b and Sebastopol's frost date answer different questions. the frost range covers how to read the range around Sebastopol's dates instead of trusting one.