Chicago weather
Loading live data…Showers,much the same tomorrow
NWS, the American and the European model agree on a high near 79° in Chicago today. Tomorrow looks cloudy around 75°, with a 0% chance of rain.
The weather map: all three models at once
NWS, American, European side by side around Chicago and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitChicago, IL. Below we compare what NWS, American, European forecast for Chicago right now and flag exactly where they disagree, then break down Chicago's weather month by month and which forecast model has been most accurate here.
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 weather by month
what to expect in Chicago through the yearHere is Chicago's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Chicago by season.
What Chicago's weather is like through the year
Chicago runs from warm summers, with July highs near 80°F, to cold winters, when January lows sit around 23°F (a swing of about 57°F across the year). July is usually the wettest month, and Chicago sees roughly 45 inches of precipitation annually. Overnight lows stay below freezing across 3 months (January, February and December), so Chicago sees regular winter snowfall.
Best time to visit Chicago
The most comfortable time to visit Chicago is usually May, September and October, when daytime highs sit in the pleasant 60-78°F range and the heaviest July rain is behind you.
Which forecast is most accurate in Chicago?
CheckWeather Score — graded against the weather that actually happened
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.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Chicago, scoring 85/100 on our CheckWeather Score, ahead of the American at 77. See the full US accuracy scoreboard for exactly how every model is tested.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.