Santa Rosa, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Santa Rosa, a city in Sonoma County, California.
Today
91°F
Sunny
Sunny. High near 91, with temperatures falling to around 85 in the afternoon. Southwest wind 0 to 7 mph.
7-day forecast for Santa Rosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny | 0 to 7 mph SW | 0% |
| Tonight | 53°F | Partly Cloudy then Patchy Fog | 0 to 5 mph SSW | 0% |
| Wednesday | 87°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph WNW | 0% |
| Wednesday Night | 52°F | Partly Cloudy then Patchy Fog | 0 to 6 mph SW | 0% |
| Thursday | 85°F | Patchy Fog then Sunny | 0 to 6 mph SW | 0% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 6 mph SW | 0% |
| Friday | 92°F | Sunny | 0 to 6 mph SSW | 0% |
| Friday Night | 55°F | Mostly Clear | 0 to 6 mph W | 0% |
| Saturday | 91°F | Sunny | 0 to 6 mph WSW | 0% |
| Saturday Night | 57°F | Mostly Clear | 0 to 6 mph WSW | 0% |
| Sunday | 90°F | Sunny | 0 to 7 mph SSW | 0% |
| Sunday Night | 54°F | Mostly Clear then Areas Of Fog | 0 to 7 mph SSW | 0% |
| Monday | 83°F | Patchy Fog then Sunny | 0 to 7 mph SSW | 0% |
| Monday Night | 53°F | Partly Cloudy | 0 to 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Santa Rosa (38.446, -122.706). Updated through the day.
Growing snapshot for Santa Rosa
Last spring frost
Feb 25
First fall frost
Dec 1
Growing season
279 days
Hardiness zone
9a
More local growing data for Santa Rosa: nearby ZIP 95405 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Santa Rosa, Ca (2.7 mi from Santa Rosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.