United States
Weather in Chicago through the year
The average of the weather stations Rock Is L&D (245 km) and Green Bay (297 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -1.3 °C | -2.0 °C – -0.3 °C |
| February | 1.0 °C | -0.9 °C – 3.7 °C |
| March | 7.7 °C | 4.2 °C – 10.8 °C |
| April | 14.6 °C | 11.0 °C – 17.5 °C |
| May | 21.3 °C | 17.7 °C – 24.6 °C |
| June | 26.8 °C | 24.8 °C – 28.4 °C |
| July | 28.7 °C | 28.3 °C – 29.0 °C |
| August | 27.4 °C | 26.4 °C – 28.3 °C |
| September | 23.9 °C | 20.8 °C – 26.2 °C |
| October | 16.4 °C | 12.3 °C – 20.5 °C |
| November | 8.0 °C | 3.9 °C – 12.1 °C |
| December | 1.4 °C | -0.2 °C – 3.7 °C |