Graton, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Graton, a community in Sonoma County, California.
Tonight
44°F
Slight Chance Light Rain then Patchy Fog
A slight chance of rain before 9pm, then patchy fog. Mostly cloudy, with a low around 44. North northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Graton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Slight Chance Light Rain then Patchy Fog | 5 mph NNE | 22% |
| Wednesday | 69°F | Patchy Fog then Sunny | 1 to 7 mph NW | 1% |
| Wednesday Night | 44°F | Partly Cloudy then Patchy Fog | 2 to 7 mph NW | 0% |
| Thursday | 74°F | Patchy Fog then Sunny | 2 mph NW | 0% |
| Thursday Night | 43°F | Mostly Clear | 2 mph NNW | 0% |
| Friday | 75°F | Sunny | 2 mph NW | 0% |
| Friday Night | 44°F | Mostly Clear | 2 mph NW | 0% |
| Saturday | 77°F | Sunny | 2 mph WSW | 0% |
| Saturday Night | 45°F | Mostly Clear then Patchy Fog | 2 mph NW | 0% |
| Sunday | 76°F | Areas Of Fog then Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 45°F | Mostly Cloudy then Areas Of Fog | 2 mph NW | 0% |
| Monday | 73°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NW | 3% |
| Monday Night | 44°F | Mostly Cloudy then Areas Of Fog | 0 to 3 mph NW | 4% |
| Tuesday | 73°F | Mostly Sunny then Slight Chance Light Rain | 0 to 3 mph WNW | 16% |
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
9a
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
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 Nov 4, 2026.