Santa Rosa, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Santa Rosa, a city 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. South 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 Santa Rosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Light Rain | 6 mph SSE | 84% |
| Tonight | 45°F | Chance Light Rain then Patchy Fog | 1 to 7 mph NE | 39% |
| Wednesday | 68°F | Patchy Fog then Sunny | 1 to 6 mph NNW | 1% |
| Wednesday Night | 45°F | Partly Cloudy then Patchy Fog | 1 to 6 mph NW | 0% |
| Thursday | 72°F | Patchy Fog then Sunny | 2 mph NNW | 0% |
| Thursday Night | 45°F | Mostly Clear | 2 mph NNW | 0% |
| Friday | 74°F | Sunny | 1 mph SW | 0% |
| Friday Night | 46°F | Mostly Clear | 1 mph NNW | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 46°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Sunday | 75°F | Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 47°F | Mostly Cloudy then Patchy Fog | 2 mph NNW | 0% |
| Monday | 72°F | Patchy Fog then Partly Sunny | 0 to 3 mph WNW | 3% |
| Monday Night | 47°F | Mostly Cloudy | 0 to 3 mph NW | 3% |
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 Nov 4, 2026.