Sebastopol, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sebastopol, a city in Sonoma County, California.
Today
68°F
Patchy Fog then Sunny
Patchy fog before 10am. Sunny. High near 68, with temperatures falling to around 64 in the afternoon. West northwest wind 1 to 9 mph, with gusts as high as 18 mph.
7-day forecast for Sebastopol
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Patchy Fog then Sunny | 1 to 9 mph WNW | 1% |
| Tonight | 43°F | Mostly Cloudy then Patchy Fog | 2 to 9 mph NW | 1% |
| Thursday | 72°F | Patchy Fog then Sunny | 0 to 5 mph NW | 0% |
| Thursday Night | 42°F | Areas Of Fog | 1 mph NNW | 0% |
| Friday | 73°F | Areas Of Fog then Mostly Sunny | 1 mph NNW | 0% |
| Friday Night | 42°F | Mostly Clear | 0 mph | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph WSW | 0% |
| Saturday Night | 43°F | Partly Cloudy then Areas Of Fog | 0 to 3 mph NW | 0% |
| Sunday | 75°F | Areas Of Fog then Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 44°F | Areas Of Fog | 2 mph NW | 0% |
| Monday | 73°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NW | 0% |
| Monday Night | 43°F | Areas Of Fog | 0 to 3 mph NNW | 1% |
| Tuesday | 73°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph WNW | 4% |
| Tuesday Night | 45°F | Areas Of Fog | 0 to 5 mph NNW | 15% |
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.