Santa Rosa, CA Weather & Growing Conditions
Today
90°F
Haze then Sunny
Haze and patchy fog before 8am. Sunny. High near 90, with temperatures falling to around 85 in the afternoon. South wind 0 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Haze then Sunny | 0 to 8 mph S | 0% |
| Tonight | 50°F | Areas Of Fog | 0 to 6 mph SSW | 0% |
| Wednesday | 87°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph WSW | 0% |
| Wednesday Night | 49°F | Areas Of Fog | 0 to 7 mph SW | 0% |
| Thursday | 85°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph WSW | 0% |
| Thursday Night | 50°F | Partly Cloudy then Patchy Fog | 0 to 7 mph WNW | 0% |
| Friday | 93°F | Patchy Fog then Mostly Sunny | 0 to 7 mph WSW | 0% |
| Friday Night | 51°F | Partly Cloudy | 0 to 7 mph SW | 0% |
| Saturday | 91°F | Sunny | 0 to 7 mph SW | 0% |
| Saturday Night | 54°F | Mostly Clear | 1 to 7 mph SSW | 0% |
| Sunday | 91°F | Sunny | 1 to 7 mph SSW | 0% |
| Sunday Night | 52°F | Mostly Clear then Areas Of Fog | 1 to 7 mph SSW | 0% |
| Monday | 84°F | Areas Of Fog then Sunny | 1 to 8 mph SSW | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 8 mph WNW | 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 Aug 4, 2026.