Santa Rosa, CA Weather & Growing Conditions
Today
81°F
Sunny
Sunny. High near 81, with temperatures falling to around 78 in the afternoon. Southwest wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 1 to 6 mph SW | 0% |
| Tonight | 56°F | Partly Cloudy | 2 mph W | 0% |
| Sunday | 76°F | Mostly Cloudy | 1 to 5 mph S | 0% |
| Sunday Night | 55°F | Mostly Cloudy | 3 mph SW | 0% |
| Monday | 77°F | Patchy Fog then Mostly Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 53°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Tuesday | 78°F | Patchy Fog then Sunny | 1 to 5 mph SW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 85°F | Sunny | 1 to 5 mph S | 0% |
| Wednesday Night | 63°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 86°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 60°F | Partly Cloudy | 1 to 5 mph WSW | 0% |
| Friday | 79°F | Mostly Sunny | 1 to 6 mph W | 1% |
| Friday Night | 56°F | Partly Cloudy | 1 to 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Santa Rosa, CA
Last spring frost
Feb 3
First fall frost
Dec 4
Growing season
306 days
Hardiness zone
9b
Explore more for Santa Rosa, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Saint Helena, Ca (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.