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Thermalito weather

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Thermalito weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Thermalito weather in numbers

from 30 years of measured normals

Thermalito swings 59°F across the year, from 98°F highs in July to 39°F lows in December, and December is usually the wettest month in a year that brings about 37 in of precipitation.

Warmest month
July
98°F average high
Coldest month
December
39°F average low
Wettest month
December
37 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
March, April, October and November
Residents
6,646
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The weather map: all three models at once

NWS, American, European side by side around Thermalito and nearby towns.Live rain radar →
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Thermalito 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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Thermalito 10-day forecast, out to 14 days

where the models agree, and where they split

Thermalito, California (CA) is at its warmest in Jul (average highs near 98°F) and coldest in Dec (lows around 39°F), with roughly 37 in of precipitation across the year. Below, compare what NWS, American, European forecast for Thermalito 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.

Thermalito climate by month

average daytime high and overnight low across a typical year (1991-2020)
Jan
55°
40°
Feb
59°
41°
Mar
62°
46°
Apr
70°
46°
May
82°
54°
Jun
91°
61°
Jul
98°
64°
Aug
96°
66°
Sep
91°
62°
Oct
78°
52°
Nov
63°
45°
Dec
54°
39°

Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.

How the weather around Thermalito has changed since 1995

Thermalito sits in the same roughly 50 km square of NASA's reanalysis as Chico. That square ran 2.1°F warmer in 2015-2024 than in 1995-2004. See the full 30-year picture on the Chico page.

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
93
/100rank #1
91±0.9°F97±1.1 mph9396% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
82
/100rank #2
83±1.7°F94±2.0 mph7184% 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 Thermalito today?
On this page we show what NWS, American, European each forecast for Thermalito 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 Thermalito today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Thermalito 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 Thermalito?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Thermalito forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Thermalito?
July is typically the warmest month in Thermalito, with average highs around 98°F.
How cold does Thermalito get?
The coldest month in Thermalito is December, when overnight lows average about 39°F.
How much rain does Thermalito get?
Thermalito sees roughly 37 in of precipitation a year, with December usually the wettest month.

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