Graton, CA Weather & Growing Conditions

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

Overnight

51°F

Haze

Haze and areas of fog. Partly cloudy, with a low around 51. Wind around 0 mph.

7-day forecast for Graton

When	Temp	Forecast	Wind	Precip
Overnight	51°F	Haze	0 mph	0%
Tuesday	91°F	Haze then Sunny	0 to 7 mph S	0%
Tuesday Night	51°F	Areas Of Fog	0 to 3 mph WNW	1%
Wednesday	87°F	Areas Of Fog then Mostly Sunny	0 to 7 mph SW	0%
Wednesday Night	50°F	Areas Of Fog	0 to 5 mph WSW	0%
Thursday	85°F	Areas Of Fog then Mostly Sunny	0 to 6 mph WSW	0%
Thursday Night	51°F	Areas Of Fog	0 to 6 mph WNW	0%
Friday	94°F	Patchy Fog then Sunny	0 to 7 mph WSW	0%
Friday Night	53°F	Partly Cloudy	0 to 7 mph W	0%
Saturday	93°F	Sunny	0 to 7 mph WSW	0%
Saturday Night	55°F	Mostly Clear	1 to 7 mph WSW	0%
Sunday	93°F	Sunny	0 to 7 mph SW	0%
Sunday Night	53°F	Mostly Clear then Areas Of Fog	0 to 7 mph W	0%
Monday	85°F	Areas Of Fog then Sunny	0 to 7 mph SSW	0%

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

Nearby towns & communities

Bloomfield Bodega Bodega Bay Boyes Hot Springs Calistoga Carmet Cazadero Cloverdale Cotati El Verano Eldridge Fetters Hot Springs-Agua Caliente Forestville Fulton Geyserville Glen Ellen Guerneville Healdsburg Jenner Kenwood Larkfield-Wikiup Monte Rio Occidental Penngrove Petaluma Rohnert Park Salmon Creek Santa Rosa Sea Ranch Sebastopol

All California locations ›

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 Aug 4, 2026.