Graton, CA Weather & Growing Conditions

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

Today

86°F

Sunny

Sunny. High near 86, with temperatures falling to around 82 in the afternoon. South southwest wind 2 to 7 mph.

7-day forecast for Graton

When	Temp	Forecast	Wind	Precip
Today	86°F	Sunny	2 to 7 mph SSW	0%
Tonight	52°F	Mostly Cloudy then Areas Of Fog	0 to 5 mph WSW	0%
Sunday	80°F	Areas Of Fog then Partly Sunny	0 to 6 mph SSE	0%
Sunday Night	52°F	Areas Of Fog	2 mph W	0%
Monday	79°F	Areas Of Fog then Mostly Sunny	0 to 6 mph SW	0%
Monday Night	51°F	Areas Of Fog	0 to 6 mph SW	0%
Tuesday	81°F	Areas Of Fog then Mostly Sunny	0 to 6 mph WSW	0%
Tuesday Night	51°F	Areas Of Fog	0 to 6 mph WNW	0%
Wednesday	89°F	Areas Of Fog then Mostly Sunny	0 to 5 mph W	0%
Wednesday Night	55°F	Partly Cloudy	0 to 5 mph NW	0%
Thursday	92°F	Mostly Sunny	0 to 6 mph W	0%
Thursday Night	55°F	Partly Cloudy	0 to 6 mph WNW	1%
Friday	86°F	Mostly Sunny	0 to 7 mph W	1%
Friday Night	53°F	Partly Cloudy	1 to 7 mph W	1%

Forecast source: National Weather Service (api.weather.gov) for Graton (38.438, -122.866). Updated through the day.

Growing snapshot for Graton

Last spring frost

Mar 20

First fall frost

Nov 13

Growing season

240 days

Hardiness zone

More local growing data for Graton: nearby ZIP 95444 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Graton, Ca (0.3 mi from Graton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.