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Hourly Forecast
Daylight Hours
06:55
Sunrise
19:09
Sunset
Moon
Waxing Crescent
11:44
Moonrise
20:52
Moonset
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Weather in Suisun today, September 15, 2026
Suisun sees a largely clear day on September 15, 2026, interrupted by cloudier skies around 23:00. Plan for bright conditions either side of that cloudier interval. Morning skies stay relatively clear, holding cloud close to 4% near 06:00. The early part of the day favours being outside.
Expect highs of 28°C and cooler readings close to 12°C. Moisture in the air spans 29%-94%, with the highest values around 06:00. Winds stay light, near 4.8 km/h by 17:00, so the day feels still more than breezy.
Through the afternoon skies look more workable, with cloud near 28% around 23:00. Later outdoor plans have a clearer window than the morning may have suggested. Visibility holds near 16.0 km, though it can fall to 14.9 km. Expect sunrise at 06:55, sunset at 19:09, and 12 hours 13 minutes of sunlight today overall.
Taken together, settled sunshine in Suisun on September 15, 2026 makes outdoor timing easier, with highs near 28°C.
Frequently asked questions about weather in Suisun
How warm does it get in Suisun?
The warmest month in Suisun is August, with average high temperatures of 31°C. The average temperature during this period is around 22°C.
How cold does it get in Suisun?
The coldest month in Suisun 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 Suisun?
The wettest month in Suisun is January, with an average of 126mm of precipitation.
What is the driest time of year in Suisun?
The driest month in Suisun is August, with an average of 0mm of precipitation.
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