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Hourly Forecast
Daylight Hours
06:39
Sunrise
18:55
Sunset
Moon
Waxing Crescent
11:34
Moonrise
20:25
Moonset
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Weather in Naperville tomorrow, September 16, 2026
Naperville stays under cloudy skies on September 16, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. Expect a grey start, with morning cloud around 100% by 01:00. Outdoor plans early on should not rely on bright skies.
The day peaks near 23°C and cools toward 15°C. Relative humidity sits between 48% and 94%, reaching its peak around 03:00. A lighter breeze peaks around 15:00 near 6.2 km/h.
Through the afternoon cloud remains the main feature, with cover near 68% around 17:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 13.8 km, briefly nearer 2.2 km. Expect sunrise at 06:40, sunset at 18:53, and 12 hours 12 minutes of sunlight today overall.
Overall, Naperville on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 23°C.
Frequently asked questions about weather in Naperville
How warm does it get in Naperville?
The warmest month in Naperville is July, with average high temperatures of 29°C. The average temperature during this period is around 24°C.
How cold does it get in Naperville?
The coldest month in Naperville is January, with average low temperatures of -7°C. The average temperature during this period is around -4°C.
What is the wettest time of year in Naperville?
The wettest month in Naperville is May, with an average of 125mm of precipitation.
What is the driest time of year in Naperville?
The driest month in Naperville is February, with an average of 54mm of precipitation.
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