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The temperatures in Chicago in May are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Chicago during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Chicago in May 2025.
If you’re planning to visit Chicago in the near future, we highly recommend that you review the 14 day weather forecast for Chicago before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 5 | 11 | 15 | 39 mm | Awful | Chicago in January |
| February | 0° / -6° | 4 | 11 | 14 | 41 mm | Awful | Chicago in February |
| March | 7° / 1° | 6 | 19 | 6 | 55 mm | Bad | Chicago in March |
| April | 12° / 5° | 7 | 21 | 3 | 79 mm | Awful | Chicago in April |
| May | 19° / 12° | 7 | 24 | 0 | 98 mm | Ok | Chicago in May |
| June | 24° / 17° | 7 | 23 | 0 | 128 mm | Good | Chicago in June |
| July | 27° / 20° | 7 | 24 | 0 | 114 mm | Good | Chicago in July |
| August | 27° / 19° | 5 | 26 | 0 | 100 mm | Perfect | Chicago in August |
| September | 24° / 16° | 4 | 26 | 0 | 64 mm | Perfect | Chicago in September |
| October | 16° / 10° | 5 | 25 | 0 | 65 mm | Good | Chicago in October |
| November | 9° / 3° | 4 | 22 | 4 | 40 mm | Bad | Chicago in November |
| December | 3° / -2° | 5 | 16 | 10 | 38 mm | Awful | Chicago in December |