Next 24 hours

US AQI

45Now
43
43
4310 PM
43
43
421 AM
41
40
394 AM
37
38
397 AM
39
39
3910 AM
39
42
441 PM
47
47
474 PM
47
45

Air quality outlook

Worst hour each day

Today49Good
Thu 847Good
Fri 982Moderate
Sat 10122Unhealthy for sensitive groups
Sun 1173Moderate

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

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About Naperville weather

Naperville is in DuPage County, Illinois, United States at 41.79°, -88.15°. Right now it’s 70° and clear; today’s high is 78° with a 0% chance of rain.

Illinois has a humid continental climate with distinct seasons marked by cold, snowy winters and hot, humid summers. The state's flat terrain allows weather systems to move across without obstruction, leading to rapid temperature changes. Chicago's position on Lake Michigan creates a unique lake-effect weather pattern that can moderate summer heat and intensify winter snowfall.