Santa Rosa, CA Weather & Growing Conditions
Tonight
52°F
Mostly Clear then Areas Of Fog
Areas of fog after 1am. Mostly clear, with a low around 52. South southeast wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear then Areas Of Fog | 1 to 5 mph SSE | 0% |
| Saturday | 86°F | Areas Of Fog then Mostly Sunny | 1 to 7 mph S | 0% |
| Saturday Night | 52°F | Mostly Cloudy then Areas Of Fog | 1 to 5 mph S | 0% |
| Sunday | 80°F | Areas Of Fog then Mostly Cloudy | 1 to 6 mph S | 0% |
| Sunday Night | 51°F | Areas Of Fog | 0 to 6 mph SSW | 0% |
| Monday | 81°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph SSW | 0% |
| Monday Night | 50°F | Areas Of Fog | 0 to 7 mph SW | 0% |
| Tuesday | 84°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph SW | 0% |
| Tuesday Night | 52°F | Areas Of Fog | 0 to 7 mph SSW | 0% |
| Wednesday | 92°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph WSW | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 6 mph WNW | 0% |
| Thursday | 92°F | Mostly Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 7 mph WSW | 0% |
| Friday | 88°F | Mostly Sunny | 1 to 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Santa Rosa, CA
Last spring frost
Mar 2
First fall frost
Nov 20
Growing season
262 days
Hardiness zone
9a
Explore more for Santa Rosa, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Santa Rosa Sonoma Co Ap, Ca (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.