National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Overcast

75°F

24°C

Humidity 84%
Wind Speed SW 5 mph
Barometer 29.95 in (1013.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 14 Jun 9:52 am CDT
Extended Forecast for

Grand Tower IL

  • Today

    Today: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. North northwest wind 5 to 8 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 67. North northwest wind 3 to 6 mph.

    Low: 67 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 85. Light north wind.

    High: 85 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. Light and variable wind.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south wind.

    Low: 70 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. South southwest wind 5 to 8 mph.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind around 8 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 90 °F

    Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. North northwest wind 5 to 8 mph.
Tonight
Mostly cloudy, with a low around 67. North northwest wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 85. Light north wind.
Sunday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. Light and variable wind.
Monday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. South southwest wind 5 to 8 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind around 8 mph.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind 7 to 11 mph.
Juneteenth
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. West northwest wind around 7 mph.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 70. Light and variable wind.
Friday
A slight chance of showers. Mostly sunny, with a high near 90. Calm wind becoming south southwest around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.64°N 89.52°W
Last Update:
8:32 am CDT Jun 14, 2025
Forecast Valid:
10am CDT Jun 14, 2025-6pm CDT Jun 20, 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