Sebastopol, CA 95416 Frost Dates
95416, near Sebastopol, CA: the frost window
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 9b (25 to 30°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
Sebastopol's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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 2,407 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,094 of 2,555.
Learn more
Two guides worth reading on 95416: zone vs. frost date, on why Zone 9b and Sebastopol's frost date answer different questions, and the frost range, on how to read the range around Sebastopol's dates instead of trusting one.