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Naperville, IL Climate
1991 to 2020 normals at Wheaton 3 SE, 5.5 mi from the center of Naperville, elevation 680 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 33° | 17° | 2.12 in | 9.3 in | |
| February | 38° | 20° | 1.96 in | 5.1 in | |
| March | 50° | 29° | 2.46 in | 4.5 in | |
| April | 63° | 38° | 4.10 in | 0.3 in | |
| May | 74° | 49° | 4.46 in | 0.0 in | |
| June | 83° | 59° | 4.65 in | 0.0 in | |
| July | 86° | 63° | 3.86 in | 0.0 in | |
| August | 84° | 62° | 4.40 in | 0.0 in | |
| September | 78° | 54° | 3.30 in | 0.0 in | |
| October | 65° | 43° | 3.56 in | 0.0 in | |
| November | 50° | 32° | 2.81 in | 0.9 in | |
| December | 38° | 23° | 2.22 in | 4.2 in | |
| Year | 62° | 39.90 in | 24.3 in |
Frequently asked questions
- What is the hottest month in Naperville, IL?
- July is the warmest month, with a normal high of 86°F at Wheaton 3 SE.
- What is the coldest month in Naperville, IL?
- January is the coldest month, with a normal low of 17°F.
- What is the wettest month in Naperville, IL?
- June has the most precipitation on average, about 4.65 inches.