Graton, CA Weather & Growing Conditions
Overnight
44°F
Chance Light Rain
A chance of rain before 4am, then patchy fog. Partly cloudy, with a low around 44. North wind around 2 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Chance Light Rain | 2 mph N | 25% |
| Wednesday | 69°F | Patchy Fog then Sunny | 1 to 9 mph NW | 2% |
| Wednesday Night | 44°F | Mostly Cloudy then Patchy Fog | 2 to 8 mph NW | 2% |
| Thursday | 74°F | Patchy Fog then Mostly Sunny | 2 mph WNW | 0% |
| Thursday Night | 41°F | Mostly Clear | 1 mph NNW | 0% |
| Friday | 75°F | Sunny | 2 mph N | 0% |
| Friday Night | 43°F | Mostly Clear | 2 mph WNW | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph WSW | 0% |
| Saturday Night | 44°F | Mostly Clear then Patchy Fog | 0 to 3 mph NNW | 0% |
| Sunday | 76°F | Areas Of Fog then Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 45°F | Partly Cloudy then Patchy Fog | 2 mph NNW | 0% |
| Monday | 73°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NW | 2% |
| Monday Night | 44°F | Partly Cloudy then Patchy Fog | 0 to 3 mph NW | 3% |
| Tuesday | 73°F | Areas Of Fog then Slight Chance Light Rain | 0 to 3 mph WNW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Graton, CA
Last spring frost
Mar 20
First fall frost
Nov 13
Growing season
240 days
Hardiness zone
9a
Explore more for Graton, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Graton, Ca (0.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.