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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

83°F

28°C

Humidity 63%
Wind Speed S 14 mph
Barometer 30.07 in (1017.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 20 Jun 9:52 am CDT
Extended Forecast for

Grand Tower IL

Heat Advisory June 21, 12:00pm until June 24, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 92. South southwest wind around 9 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind around 7 mph.

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 109. South southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 76. South wind 6 to 10 mph.

    Low: 76 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 96. South southwest wind 6 to 10 mph.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76. South wind 3 to 7 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 95. South wind 3 to 6 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Calm wind becoming south around 6 mph in the afternoon.

    High: 94 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 92. South southwest wind around 9 mph.
Tonight
Clear, with a low around 75. South wind around 7 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 109. South southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 76. South wind 6 to 10 mph.
Sunday
Sunny, with a high near 96. South southwest wind 6 to 10 mph.
Sunday Night
Clear, with a low around 76. South wind 3 to 7 mph.
Monday
Sunny, with a high near 95. South wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 94. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 94. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.62°N 89.49°W
Last Update:
5:46 am CDT Jun 20, 2025
Forecast Valid:
10am CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation