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August and Meteorological Summer 2026 Climate Summaries

Hazardous Weather Conditions

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Fair

95°F

35°C

Humidity	51%
Wind Speed	W 6 mph
Barometer	29.91 in
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	106°F (41°C)
Last update	4 Sep 4:55 pm CDT

More Information:

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

Extended Forecast for

4 Miles SSW Cullom IL

Heat Advisory September 4, 05:15pm until September 4, 10:00pm

Click here for hazard details and duration

...

Heat Advisory September 4, 05:15pm until September 4, 10:00pm
NOW until 10:00pm Fri
Heat Advisory
Tonight
Low: 73 °F
Partly Cloudy
then Slight
Chance
T-storms
Saturday
High: 91 °F
Sunny
Saturday Night
Low: 65 °F
Increasing
Clouds
Sunday
High: 84 °F
Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Labor Day
High: 85 °F
Sunny
Monday Night
Low: 62 °F
Partly Cloudy
Tuesday
High: 91 °F
Mostly Sunny

Detailed Forecast

Tonight

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. West southwest wind around 5 mph becoming calm in the evening.

Saturday

Sunny, with a high near 91. Heat index values as high as 101. Light and variable wind becoming north 5 to 10 mph in the afternoon.

Saturday Night

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

Sunday

Sunny, with a high near 84. East northeast wind around 5 mph, with gusts as high as 15 mph.

Sunday Night

Mostly clear, with a low around 60. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph.

Labor Day

Sunny, with a high near 85.

Monday Night

Partly cloudy, with a low around 62.