Sebastopol, CA 94923 Frost Dates
Sebastopol, CA: when does the frost end?
Around 01/01 is the usual last spring frost, about 126 days away. Fall's first freeze usually shows up around 12/31, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sebastopol in Zone 10a (30 to 35°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 01/01 isn't a guarantee
01/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/08 and only about 1 year in 10 sees frost after that.
Sebastopol against the rest of the dataset
Sebastopol's growing season runs about 365 days, ranking 1,755 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 857 of 2,555.
Learn more
Before leaning on 94923'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.