See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
16°
Overcast
Feels Like: 22°
Min: 15°
Max: 20°
The next few hours will be clear, with tomorrow reaching 21°C and dropping to 21°C. The coming days will be partly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:55
Sunrise
19:12
Sunset
Moon
Waxing Crescent
10:41
Moonrise
20:25
Moonset
Daily Forecast
Monday
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
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Weather in Vallejo tomorrow, September 15, 2026
Vallejo starts September 15, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Cloud leads the morning, peaking close to 100% near 00:00. Sunshine has little room until later in the day.
The temperature range runs from about 15°C up to 21°C. Expect humidity between 62% and 88%, most humid near 11:00. A lighter breeze peaks around 15:00 near 6.4 km/h.
Afternoon conditions open up, holding cloud close to 39% near 22:00. The day finishes on a milder, brighter note. Visibility holds near 16.1 km, though it can fall to 15.8 km. Sunrise is at 06:56 and sunset at 19:10, giving 12 hours 13 minutes of sunlight today.
In short, September 15, 2026 looks like a fine day in Vallejo for being outside, peaking around 21°C.
Frequently asked questions about weather in Vallejo
How warm does it get in Vallejo?
The warmest month in Vallejo is September, with average high temperatures of 28°C. The average temperature during this period is around 20°C.
How cold does it get in Vallejo?
The coldest month in Vallejo is December, with average low temperatures of 6°C. The average temperature during this period is around 10°C.
What is the wettest time of year in Vallejo?
The wettest month in Vallejo is January, with an average of 114mm of precipitation.
What is the driest time of year in Vallejo?
The driest month in Vallejo is July, with an average of 0mm of precipitation.
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