Sebastopol, CA 94971 Frost Dates
When can you plant in Sebastopol, CA?
The last spring frost here typically falls around 01/29, about 154 days from today. The first fall frost typically arrives around 12/30, about 347 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Sebastopol, not a forecast for this year.
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.
Why 01/29 isn't a guarantee
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
At roughly 347 frost-free days, Sebastopol places 2,404 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,091 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.