Sebastopol, CA 95465 Frost Dates
Sebastopol, CA: when does the frost end?
The last spring frost here typically falls around 01/29, about 154 days from today. Fall's first freeze usually shows up around 12/30, roughly 347 days after the last spring frost.
Zone 10a (30 to 35°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.
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 2,411 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,098 of 2,555.
Learn more
Before leaning on 95465's figures: zone vs. frost date explains why Zone 10a and Sebastopol's frost date answer different questions, while the frost range explains how to read the range around Sebastopol's dates instead of trusting one.