See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:44
Sunrise
17:47
Sunset
Moon
Waxing Gibbous
17:07
Moonrise
04:48
Moonset
Daily Forecast
Today
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Air Quality Data Available
Upgrade to access real-time air quality data for Santa Rosa.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Santa Rosa.
View stargazing scoreWeather in Santa Rosa today, September 25, 2026
Santa Rosa starts September 25, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Morning plans should assume damp conditions, as rain chances climb toward 24% around 07:00. Cloud cover is also at its densest near 07:00 at roughly 58%.
The day peaks near 29°C and cools toward 22°C. Relative humidity sits between 58% and 84%, reaching its peak around 19:00. Winds stay light, near 1.6 km/h by 13:00, so the day feels still more than breezy.
Afternoon conditions improve on the morning wet spell, as rain chances fall toward 16% from about 24% earlier. Cloud still reaches roughly 42% near 12:00. Expect visibility around 16.1 km. Sunrise is at 05:44 and sunset at 17:47, giving 12 hours 3 minutes of sunlight today.
Overall, Santa Rosa on September 25, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 24% and the high sits around 29°C.
Frequently asked questions about weather in Santa Rosa
How warm does it get in Santa Rosa?
The warmest month in Santa Rosa is October, with average high temperatures of 23°C. The average temperature during this period is around 17°C.
How cold does it get in Santa Rosa?
The coldest month in Santa Rosa is July, with average low temperatures of 7°C. The average temperature during this period is around 15°C.
What is the wettest time of year in Santa Rosa?
The wettest month in Santa Rosa is February, with an average of 156mm of precipitation.
What is the driest time of year in Santa Rosa?
The driest month in Santa Rosa is July, with an average of 11mm of precipitation.
