National Weather Service

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August 11, 2026: Derecho produces widespread wind damage and tornadoes across northern Illinois and northwest Indiana

Current conditions at

Lansing Municipal Airport (KIGQ)

Lat: 41.54°NLon: 87.53°WElev: 607ft.

Fair

71°F

22°C

Humidity	61%
Wind Speed	NE 3 mph
Barometer	30.01 in
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Last update	17 Aug 7:55 pm CDT

More Information:

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

Extended Forecast for

Park Forest IL

Tonight
Low: 60 °F
Mostly Clear
Tuesday
High: 79 °F
Mostly Sunny
then Slight
Chance
T-storms
Tuesday Night
Low: 66 °F
Showers
Likely
Wednesday
High: 77 °F
Partly Sunny
Wednesday Night
Low: 62 °F
Partly Cloudy
Thursday
High: 78 °F
Sunny
Thursday Night
Low: 59 °F
Mostly Clear
Friday
High: 78 °F
Mostly Sunny
Friday Night
Low: 62 °F
Chance
Showers

Detailed Forecast

Tonight

Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm.

Tuesday

A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday Night

A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 66. West southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Partly sunny, with a high near 77. Northwest wind around 5 mph.

Wednesday Night

Partly cloudy, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.

Thursday

Sunny, with a high near 78.

Thursday Night

Mostly clear, with a low around 59.

Friday

Mostly sunny, with a high near 78.

Friday Night

A chance of showers. Partly cloudy, with a low around 62.