See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Partly Cloudy
Feels Like: 21°
Min: 21°
Max: 31°
The next few hours will be possible drizzle, with today reaching 31°C and dropping to 21°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:55
Sunrise
17:52
Sunset
Moon
Waxing Crescent
08:53
Moonrise
21:02
Moonset
Daily Forecast
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Weather in Santa Rosa today, September 15, 2026
Rain features in Santa Rosa on September 15, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. The morning sky stays heavily clouded, with cover near 78% around 07:00. Grey conditions set the early tone before any later change.
Expect highs of 31°C and cooler readings close to 21°C. Expect humidity between 50% and 91%, most humid near 18:00. Winds stay light, near 1.5 km/h by 10:00, so the day feels still more than breezy.
Afternoon showers stay in play, peaking near 80% around 14:00. Skies remain cluttered, with cover about 73% by 23:00. Expect visibility near 15.6 km, with poorer spells close to 10.1 km. Expect sunrise at 05:55, sunset at 17:52, and 11 hours 56 minutes of sunlight today overall.
The practical takeaway for Santa Rosa on September 15, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 31°C.
Frequently asked questions about weather in Santa Rosa
How warm does it get in Santa Rosa?
The warmest month in Santa Rosa is September, with average high temperatures of 24°C. The average temperature during this period is around 19°C.
How cold does it get in Santa Rosa?
The coldest month in Santa Rosa is July, with average low temperatures of 14°C. The average temperature during this period is around 18°C.
What is the wettest time of year in Santa Rosa?
The wettest month in Santa Rosa is January, with an average of 477mm of precipitation.
What is the driest time of year in Santa Rosa?
The driest month in Santa Rosa is July, with an average of 78mm of precipitation.
