Sebastopol, CA 94927 Frost Dates
Sebastopol, CA: when does the frost end?
Around 01/29 is the usual last spring frost, about 154 days away. Fall's first freeze usually shows up around 12/30, roughly 347 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sebastopol in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 18 weeks until Sebastopol's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/29 isn't a guarantee
01/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/17 and only about 1 year in 10 sees frost after that.
Sebastopol against the rest of the dataset
At roughly 347 frost-free days, Sebastopol places 2,401 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,088 of 2,555.
Learn more
Before leaning on 94927's figures: local microclimates explains what one yard in Sebastopol can differ from the 94927 normal, while zone vs. frost date explains why Zone 9a and Sebastopol's frost date answer different questions.