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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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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.