Sebastopol, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sebastopol, a city in Sonoma County, California.
Tonight
43°F
Partly Cloudy then Patchy Fog
Patchy fog after 4am. Partly cloudy, with a low around 43. North northeast wind 2 to 7 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sebastopol
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Partly Cloudy then Patchy Fog | 2 to 7 mph NNE | 6% |
| Wednesday | 68°F | Patchy Fog then Sunny | 1 to 9 mph NW | 2% |
| Wednesday Night | 43°F | Mostly Cloudy then Patchy Fog | 2 to 8 mph NW | 2% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 2 mph WNW | 0% |
| Thursday Night | 40°F | Mostly Clear then Patchy Fog | 2 mph NNW | 0% |
| Friday | 74°F | Patchy Fog then Mostly Sunny | 1 mph NNE | 0% |
| Friday Night | 42°F | Mostly Clear | 0 mph | 0% |
| Saturday | 75°F | Sunny | 0 to 3 mph WSW | 0% |
| Saturday Night | 42°F | Partly Cloudy then Areas Of Fog | 0 to 3 mph NW | 0% |
| Sunday | 75°F | Areas Of Fog then Mostly Sunny | 1 mph NNW | 0% |
| Sunday Night | 43°F | Mostly Cloudy then Areas Of Fog | 1 mph NNW | 0% |
| Monday | 72°F | Areas Of Fog then Partly Sunny | 0 to 5 mph WNW | 2% |
| Monday Night | 43°F | Partly Cloudy then Areas Of Fog | 0 to 5 mph NNW | 3% |
| Tuesday | 72°F | Areas Of Fog then Sunny | 0 to 5 mph WNW | 11% |
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 Nov 4, 2026.