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CheckWeather USChicago Loop

Chicago Loop weather

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Chicago Loop weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Chicago Loop weather in numbers

from 30 years of measured normals

Chicago Loop swings 57°F across the year, from 80°F highs in July to 23°F lows in January, and July is usually the wettest month in a year that brings about 45 in of precipitation.

Warmest month
July
80°F average high
Coldest month
January
23°F average low
Wettest month
July
45 in a year
Below freezing
3 months
January, February and December
Comfortable
3 months
May, September and October
Residents
33,000
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The weather map: all three models at once

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

where the models agree, and where they split

Chicago Loop, Illinois (IL) is at its warmest in Jul (average highs near 80°F) and coldest in Jan (lows around 23°F), with roughly 45 in of precipitation across the year. Below, compare what NWS, American, European forecast for Chicago Loop 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.

Chicago Loop climate by month

average daytime high and overnight low across a typical year
Jan
34°
23°
Feb
43°
27°
Mar
47°
32°
Apr
59°
41°
May
68°
51°
Jun
79°
62°
Jul
80°
65°
Aug
80°
65°
Sep
75°
61°
Oct
64°
49°
Nov
50°
38°
Dec
40°
30°

Which forecast is most accurate in Chicago Loop?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
86
/100rank #1
93±0.7°F97±0.8 mph7184% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
70
/100rank #2
82±1.8°F92±2.5 mph4268% 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 Chicago Loop today?
On this page we show what NWS, American, European each forecast for Chicago Loop 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 Chicago Loop today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Chicago Loop 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 Chicago Loop?
Over the last 30 days, the European model has been the most accurate for Chicago Loop (CheckWeather Score 86/100), ahead of the American at 70. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Chicago Loop?
July is typically the warmest month in Chicago Loop, with average highs around 80°F.
How cold does Chicago Loop get?
The coldest month in Chicago Loop is January, when overnight lows average about 23°F.
How much rain does Chicago Loop get?
Chicago Loop sees roughly 45 in of precipitation a year, with July usually the wettest month.

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