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August and Meteorological Summer 2026 Climate Summaries

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Fair

91°F

33°C

Humidity	67%
Wind Speed	S 8 mph
Barometer	29.90 in
Dewpoint	79°F (26°C)
Visibility	10.00 mi
Heat Index	107°F (42°C)
Last update	4 Sep 4:50 pm CDT

More Information:

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

Extended Forecast for

3 Miles NW Plainfield IL

Heat Advisory September 4, 05:17pm until September 4, 10:00pm

Click here for hazard details and duration

...

Heat Advisory September 4, 05:17pm until September 4, 10:00pm
NOW until 10:00pm Fri
Heat Advisory
Tonight
Low: 72 °F
Mostly Clear
then Chance
T-storms and
Patchy Fog
Saturday
High: 86 °F
Patchy Fog
then Mostly
Sunny
Saturday Night
Low: 65 °F
Mostly Clear
Sunday
High: 82 °F
Sunny
Sunday Night
Low: 61 °F
Mostly Clear
Labor Day
High: 82 °F
Sunny
Monday Night
Low: 63 °F
Partly Cloudy
Tuesday
High: 87 °F
Mostly Sunny

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly between 1am and 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 72. West wind around 5 mph becoming calm in the evening.

Saturday

Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Heat index values as high as 95. North wind 5 to 10 mph, with gusts as high as 15 mph.

Saturday Night

Mostly clear, with a low around 65. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Sunday

Sunny, with a high near 82. East northeast wind 5 to 10 mph.

Sunday Night

Mostly clear, with a low around 61. East northeast wind around 5 mph, with gusts as high as 10 mph.

Labor Day

Sunny, with a high near 82.

Monday Night

Partly cloudy, with a low around 63.

Tuesday

Mostly sunny, with a high near 87.