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Sebastopol, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Sebastopol, a city in Sonoma County, California.

Tonight
52°F
Mostly Clear then Areas Of Fog
Areas of fog after 1am. Mostly clear, with a low around 52. Southwest wind 0 to 5 mph.

7-day forecast for Sebastopol

WhenTempForecastWindPrecip
Tonight 52°F Mostly Clear then Areas Of Fog 0 to 5 mph SW 0%
Saturday 83°F Areas Of Fog then Sunny 0 to 8 mph SSW 0%
Saturday Night 52°F Mostly Cloudy then Areas Of Fog 0 to 6 mph S 0%
Sunday 78°F Areas Of Fog then Partly Sunny 0 to 7 mph SSW 0%
Sunday Night 52°F Areas Of Fog 0 to 7 mph SW 0%
Monday 79°F Areas Of Fog then Mostly Sunny 0 to 7 mph WSW 0%
Monday Night 51°F Areas Of Fog 0 to 7 mph WSW 0%
Tuesday 81°F Areas Of Fog then Mostly Sunny 0 to 7 mph WSW 0%
Tuesday Night 52°F Mostly Clear then Patchy Fog 0 to 7 mph WNW 0%
Wednesday 89°F Areas Of Fog then Mostly Sunny 0 to 7 mph W 0%
Wednesday Night 54°F Partly Cloudy 0 to 7 mph WNW 0%
Thursday 90°F Mostly Sunny 0 to 7 mph WSW 0%
Thursday Night 55°F Partly Cloudy 0 to 7 mph WNW 0%
Friday 85°F Mostly Sunny 0 to 8 mph W 0%

Forecast source: National Weather Service (api.weather.gov) for Sebastopol (38.400, -122.828). Updated through the day.

Growing snapshot for Sebastopol

Last spring frost
Mar 20
First fall frost
Nov 13
Growing season
240 days
Hardiness zone
9a

More local growing data for Sebastopol: nearby ZIP 95472 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Graton, Ca (2.2 mi from Sebastopol). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.