Chicago weather
Loading live data…Latest for Chicago: European (ECMWF): 19° Heavy drizzle · American (NOAA GFS): 18° Overcast · German (DWD ICON): 19° Light rain.
The weather map: all three models at once
European, American, German side by side around Chicago and nearby towns.Live rain radar →Hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
10-day forecast, out to 14 days
where the models agree, and where they splitHeading to Chicago? Chicago, USA, sits at 41.9°N in a temperate climate zone. Before you lock in outdoor plans, compare how the three global models - European (ECMWF), American (GFS) and German (ICON) - forecast Chicago right now. Where they agree you can trust it; the days they split are exactly when a single weather app is least reliable. For a city break, the rain hours below tell you which days to plan indoors.
Best time to visit Chicago
The most comfortable time to visit Chicago is usually April, September and October, when daytime highs sit in the pleasant 16-26°C range and the heaviest May rain is behind you.
Chicago weather by month
what to expect in Chicago through the year, 1991-2020 normals, Chicago Midway AP (WMO)Here is Chicago's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Chicago by season.
Chicago compared with Toronto
30-year averages: daytime highs month by month, rain and sunlightWarmer through the year
average daytime high: Chicago 16°C, Toronto 14°C
Rain over a year
Chicago 875 mm, Toronto 924 mm
Sunlight vs a clear sky
solar energy reaching the ground as a share of a cloudless day, averaged over the year (not sunshine hours)
On 30-year averages Chicago runs 2°C warmer than Toronto, with every month between ±0°C and +4°C. Over a year it gets 5% less rain than Toronto.
Month by month in numbers
| Month | Chicago | Toronto | Difference | Sunlight, Chicago | Sunlight, Toronto |
|---|---|---|---|---|---|
| January | 0°C | 0°C | ±0°C | 59% | 56% |
| February | 3°C | 1°C | +2°C | 63% | 57% |
| March | 9°C | 5°C | +4°C | 67% | 64% |
| April | 16°C | 12°C | +4°C | 69% | 67% |
| May | 22°C | 19°C | +3°C | 70% | 72% |
| June | 27°C | 24°C | +3°C | 77% | 76% |
| July | 29°C | 27°C | +2°C | 80% | 79% |
| August | 28°C | 26°C | +2°C | 79% | 79% |
| September | 25°C | 22°C | +3°C | 79% | 76% |
| October | 18°C | 15°C | +3°C | 70% | 63% |
| November | 10°C | 8°C | +2°C | 66% | 60% |
| December | 3°C | 3°C | ±0°C | 59% | 54% |
Daytime highs and lows on this page are 1991-2020 averages. Chicago: station normals from Chicago Midway AP (WMO), rain included. Toronto: station normals from Toronto City (WMO); rain is the CHELSA 1981-2010 climatology on a 1 km grid. Sunlight vs a clear sky is NASA POWER's long-term average of the solar energy reaching the ground as a share of a cloudless day; it compares cloudiness and is not a count of sunshine hours. Toronto stands in for Canada here; other cities have their own climate tables.