Chicago, IL
Climate overview — based on NOAA 1991-2020 normals from CHICAGO NORTHERLY IS, IL US.
Year-round temperatures (°F)
Avg high
Avg low
Climate summary
Chicago has an annual average temperature of 50.8°F with about 0 inches of precipitation per year. The warmest month is July (average high 81.0°F), and the coldest is January (average low 20.1°F).
Pleasant months
4 / 12
avg high 65–80°F, low ≥ 50°F
Annual swing
48.1°F
warmest to coldest month
Best time to visit Chicago
Full guide →Climate change signal
All-time records →178 of 366 (48.6%) of Chicago's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 2000s | 82 | |
| 2010s | 187 | |
| 2020s | 97 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 31.9°F | 20.1°F | 26.0°F | in | — | — |
| February | 35.7°F | 23.1°F | 29.4°F | in | — | — |
| March | 44.9°F | 30.9°F | 37.9°F | in | — | — |
| April | 55.2°F | 40.4°F | 47.8°F | in | — | — |
| May | 65.7°F | 50.1°F | 57.9°F | in | — | — |
| June | 75.8°F | 60.0°F | 67.9°F | in | — | — |
| July | 81.0°F | 67.3°F | 74.1°F | in | — | — |
| August | 80.0°F | 67.4°F | 73.7°F | in | — | — |
| September | 73.2°F | 60.2°F | 66.7°F | in | — | — |
| October | 60.9°F | 47.7°F | 54.3°F | in | — | — |
| November | 48.5°F | 36.4°F | 42.5°F | in | — | — |
| December | 36.6°F | 25.2°F | 30.9°F | in | — | — |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when