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August and Meteorological Summer 2026 Climate Summaries

Hazardous Weather Conditions

Current conditions at

Chicago / West Chicago, Dupage Airport (KDPA)

Lat: 41.9°NLon: 88.25°WElev: 758ft.

Fair

91°F

33°C

Humidity	59%
Wind Speed	W 9 mph
Barometer	29.91 in (1012.3 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	102°F (39°C)
Last update	4 Sep 4:52 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles SW Naperville IL

Heat Advisory September 4, 05:38pm until September 4, 10:00pm

Click here for hazard details and duration

...

Heat Advisory September 4, 05:38pm until September 4, 10:00pm
NOW until 10:00pm Fri
Heat Advisory
Tonight
Low: 73 °F
Chance
T-storms and
Patchy Fog
Saturday
High: 86 °F
Patchy Fog
then Mostly
Sunny
Saturday Night
Low: 66 °F
Mostly Clear
Sunday
High: 81 °F
Sunny
Sunday Night
Low: 63 °F
Mostly Clear
Labor Day
High: 82 °F
Mostly Sunny
Monday Night
Low: 64 °F
Partly Cloudy
Tuesday
High: 87 °F
Partly Sunny

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly between 1am and 3am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening.

Saturday

Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. North wind 5 to 10 mph, with gusts as high as 15 mph.

Saturday Night

Mostly clear, with a low around 66. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Sunday

Sunny, with a high near 81. East northeast wind 5 to 10 mph.

Sunday Night

Mostly clear, with a low around 63. East northeast wind around 5 mph, with gusts as high as 10 mph.

Labor Day

Mostly sunny, with a high near 82.

Monday Night

Partly cloudy, with a low around 64.