Windsor, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Windsor, a town in Sonoma County, California.
Overnight
52°F
Haze
Haze before 5am, then haze and patchy fog. Partly cloudy, with a low around 52. South southeast wind around 1 mph.
7-day forecast for Windsor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Haze | 1 mph SSE | 0% |
| Tuesday | 93°F | Haze then Sunny | 1 to 7 mph S | 0% |
| Tuesday Night | 51°F | Areas Of Fog | 0 to 6 mph S | 0% |
| Wednesday | 89°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph SSW | 0% |
| Wednesday Night | 50°F | Areas Of Fog | 0 to 7 mph WSW | 0% |
| Thursday | 87°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 7 mph SW | 0% |
| Friday | 95°F | Sunny | 0 to 7 mph SSW | 0% |
| Friday Night | 53°F | Mostly Clear | 0 to 7 mph SW | 0% |
| Saturday | 94°F | Sunny | 0 to 7 mph SSW | 0% |
| Saturday Night | 56°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Sunday | 94°F | Sunny | 1 to 8 mph SSW | 0% |
| Sunday Night | 54°F | Mostly Clear then Areas Of Fog | 1 to 8 mph SSW | 0% |
| Monday | 86°F | Areas Of Fog then Sunny | 1 to 8 mph SSW | 0% |
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 Aug 4, 2026.