Windsor, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Windsor, a town in Sonoma County, California.
This Afternoon
60°F
Light Rain
Rain. Mostly cloudy. High near 60, with temperatures falling to around 56 in the afternoon. Southeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Windsor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Light Rain | 6 mph SE | 81% |
| Tonight | 42°F | Chance Light Rain then Patchy Fog | 2 to 6 mph NNE | 34% |
| Wednesday | 69°F | Patchy Fog then Sunny | 1 to 7 mph NNW | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 2 to 7 mph NW | 0% |
| Thursday | 74°F | Sunny | 2 mph WNW | 0% |
| Thursday Night | 43°F | Mostly Clear | 2 mph NW | 0% |
| Friday | 75°F | Sunny | 2 mph WNW | 0% |
| Friday Night | 44°F | Mostly Clear | 2 mph WNW | 0% |
| Saturday | 77°F | Sunny | 0 to 3 mph SSE | 0% |
| Saturday Night | 45°F | Mostly Clear then Patchy Fog | 0 to 3 mph NNW | 0% |
| Sunday | 76°F | Patchy Fog then Mostly Sunny | 2 mph WNW | 0% |
| Sunday Night | 45°F | Mostly Cloudy then Areas Of Fog | 2 mph NW | 0% |
| Monday | 74°F | Areas Of Fog then Partly Sunny | 3 mph W | 3% |
| Monday Night | 44°F | Mostly Cloudy then Patchy Fog | 0 to 3 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Windsor (38.542, -122.809). Updated through the day.
Growing snapshot for Windsor
Last spring frost
Mar 2
First fall frost
Nov 20
Growing season
262 days
Hardiness zone
9a
More local growing data for Windsor: nearby ZIP 95492 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Santa Rosa Sonoma Co Ap, Ca (1.8 mi from Windsor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.