Sebastopol, CA 95472 Frost Dates
Sebastopol, CA: when does the frost end?
Around 03/20 is the usual last spring frost, about 204 days away. Fall's first freeze usually shows up around 11/13, roughly 240 days after the last spring frost.
Sebastopol sits in USDA Zone 9a (20 to 25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 11 weeks until Sebastopol's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/19 and only about 1 year in 10 sees frost after that.
Sebastopol against the rest of the dataset
At roughly 240 frost-free days, Sebastopol places 8,684 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,123 of 2,555.
Learn more
Before leaning on 95472's figures: the frost range explains how to read the range around Sebastopol's dates instead of trusting one, while local microclimates explains what one yard in Sebastopol can differ from the 95472 normal.