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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

50°F

10°C

Humidity 96%
Wind Speed S 3 mph
Barometer 30.01 in (1015.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 6 Oct 11:52 pm CDT
Extended Forecast for

2 Miles NW Grand Tower IL

  • Overnight

    Overnight: Clear, with a low around 49. Calm wind.

    Low: 49 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Light and variable wind.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 56. Calm wind.

    Low: 56 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming east southeast around 6 mph in the morning.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57. Light southeast wind.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Light south southeast wind becoming south 5 to 9 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers. Partly cloudy, with a low around 58. Southeast wind around 6 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 49. Calm wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 59. Light and variable wind.
Thursday
Sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 56. Calm wind.
Friday
Sunny, with a high near 83. Calm wind becoming east southeast around 6 mph in the morning.
Friday Night
Clear, with a low around 57. Light southeast wind.
Saturday
Mostly sunny, with a high near 85. Light south southeast wind becoming south 5 to 9 mph in the morning.
Saturday Night
A chance of showers. Partly cloudy, with a low around 58. Southeast wind around 6 mph.
Sunday
A chance of showers, mainly before 1pm. Partly sunny, with a high near 76. East wind 5 to 7 mph becoming north in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Light west northwest wind.
Columbus Day
Mostly sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 59. South southeast wind 3 to 5 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 81. Light south southwest wind increasing to 5 to 9 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Grand Tower IL
 37.67°N 89.54°W
Last Update:
11:36 pm CDT Oct 6, 2026
Forecast Valid:
12am CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
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Additional Resources

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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