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Weather in Suisun City, CA · National Weather Service + NOAA

It hardly ever freezes in Suisun City

Suisun City has mild winters and warm summers, with very little rain. A typical July afternoon reaches 89°, a January night drops to 40°, and snow is almost unheard of. A typical November afternoon reaches 66°, and nights fall to 44°.

Winter 59°/40°Spring 72°/48°Summer 88°/57°Fall 77°/50°
Right now
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Sunrise 9:37 am · sunset 8:05 pm

Getting the latest forecast from the National Weather Service…

What stands out about Suisun City’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
It hardly ever freezesOnly 88% of years see a night at 32° or below.Snow is rareNo measurable snow in a normal year.Plenty of 90° daysAbout 60 days a year reach 90°.
A normal year

Where today sits in Suisun City’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
59° / 40°
Snow is rare
Spring
72° / 48°
Frost is rare by spring
Summer
88° / 57°
60 days reach 90° in a normal year
Fall now
77° / 50°
Mild well into the fall
Best months to be outside
FebMarAprMayOctNov
Highs of 62–84° and lows of 40° or more
How much snow does Suisun City get?Almost none.When is it wettest?December, with 4.4 inches.Is it warmer than it used to be?+1.7° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Suisun City.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Suisun City itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Fairfield, CA (4 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.