Climate of Chicago, Illinois, USA
Point-value climate at Chicago (Illinois, United States of America). Population approximately 8,990,000.
Located in Illinois, United States of America, Chicago has a strongly continental climate. Population approximately 8,990,000. Monthly average temperatures range from -5.1°C / 22.8°F in January to 23.5°C / 74.3°F in July, with rainfall varying from 40 mm / 1.6 in (February) to 103 mm / 4.1 in (June) — about 953 mm / 37.5 in across the year. These are point-value climate normals sampled at Chicago's coordinates — often quite different from the surrounding region's area-weighted average.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | -5.1°C22.8°F | 46 mm1.8″ | Snowy |
| February | -2.3°C27.9°F | 40 mm1.6″ | Snowy |
| March | 3.1°C37.6°F | 68 mm2.7″ | — |
| April | 9.2°C48.6°F | 97 mm3.8″ | — |
| May | 15.3°C59.5°F | 93 mm3.7″ | — |
| June | 20.9°C69.6°F | 103 mm4.1″ | — |
| July | 23.5°C74.3°F | 96 mm3.8″ | — |
| August | 22.6°C72.7°F | 102 mm4″ | — |
| September | 18.5°C65.3°F | 91 mm3.6″ | — |
| October | 11.8°C53.2°F | 71 mm2.8″ | — |
| November | 4.6°C40.3°F | 81 mm3.2″ | — |
| December | -2°C28.4°F | 65 mm2.6″ | Snowy |
Frequently asked questions
What is the best time to visit Chicago?
Chicago does not have a clearly "sunny" season by our profile cutoffs — see the "warmest and driest months" fallback for the closest picks. Chicago's warmest month is July at an average of 23.5°C / 74.3°F, and its driest month is February with about 40 mm / 1.6 in of rain.
What is the climate of Chicago?
Chicago, in Illinois, United States of America, has monthly average temperatures ranging from -5.1°C / 22.8°F in January to 23.5°C / 74.3°F in July. Annual rainfall is approximately 953 mm / 37.5 in, with the wettest month being June (103 mm / 4.1 in) and the driest February (40 mm / 1.6 in).
What is the average temperature in Chicago in July?
The average temperature in Chicago in July is 23.5°C / 74.3°F, with rainfall of about 96 mm / 3.8 in — the warmest month of the year.
When is the driest month in Chicago?
The driest month in Chicago is February, with about 40 mm / 1.6 in of average monthly rainfall. Average temperature that month is -2.3°C / 27.9°F.
When is the wettest month in Chicago?
The wettest month in Chicago is June, with approximately 103 mm / 4.1 in of average monthly rainfall.