Sebastopol, CA 95444 Frost Dates
Frost dates for Sebastopol, CA, ZIP 95444
Around 03/20 is the usual last spring frost, about 204 days away. The first fall frost typically arrives around 11/13, about 240 frost-free days later.
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.
What to do before the first frost
Zone 9a around Sebastopol has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Sebastopol's last frost
03/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/12 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sebastopol compares
Sebastopol's growing season runs about 240 days, ranking 8,683 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,122 of 2,555.
Learn more
zone vs. frost date explains why Zone 9a and Sebastopol's frost date answer different questions, and the frost range explains how to read the range around Sebastopol's dates instead of trusting one.