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Suisun weather

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Suisun weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Suisun weather in numbers

from 30 years of measured normals

Suisun swings 49°F across the year, from 90°F highs in July to 41°F lows in February, and January is usually the wettest month in a year that brings about 34 in of precipitation.

Warmest month
July
90°F average high
Coldest month
February
41°F average low
Wettest month
January
34 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
3 months
April, May and November
Residents
28,000
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The weather map: all three models at once

NWS, American, European side by side around Suisun and nearby towns.Live rain radar →
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Suisun hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Suisun 10-day forecast, out to 14 days

where the models agree, and where they split

Suisun, California (CA) is at its warmest in Jul (average highs near 90°F) and coldest in Feb (lows around 41°F), with roughly 34 in of precipitation across the year. Below, compare what NWS, American, European forecast for Suisun right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Suisun climate by month

average daytime high and overnight low across a typical year
Jan
57°
43°
Feb
57°
41°
Mar
59°
43°
Apr
68°
46°
May
73°
51°
Jun
80°
55°
Jul
90°
57°
Aug
87°
58°
Sep
83°
56°
Oct
80°
55°
Nov
65°
46°
Dec
59°
43°

Which forecast is most accurate in Suisun?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
92
/100rank #1
85±1.5°F98±0.7 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
92
/100rank #2
88±1.2°F95±1.7 mph9597% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Suisun today?
On this page we show what NWS, American, European each forecast for Suisun today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Suisun today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Suisun and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Suisun?
Over the last 30 days, the European model has been the most accurate for Suisun (CheckWeather Score 92/100), ahead of the American at 92. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Suisun?
July is typically the warmest month in Suisun, with average highs around 90°F.
How cold does Suisun get?
The coldest month in Suisun is February, when overnight lows average about 41°F.
How much rain does Suisun get?
Suisun sees roughly 34 in of precipitation a year, with January usually the wettest month.

Nearby

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