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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

46°F

8°C

Humidity 47%
Wind Speed S 13 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 12 Mar 11:52 pm CDT
Extended Forecast for

Grand Tower IL

  • Overnight

    Overnight: Partly cloudy, with a low around 41. South southwest wind 10 to 18 mph, with gusts as high as 34 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 65. Southwest wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 38. North northwest wind around 6 mph becoming light and variable.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 68. East northeast wind 5 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. South wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 16 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.

    High: 72 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 1am, then a chance of rain and snow showers. Some thunder is also possible. Low around 25. Breezy, with a southwest wind around 24 mph becoming west northwest after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 80%.

    Low: 25 °F

    Showers and
    Breezy then
    Rain/Snow and
    Blustery

  • Monday

    Monday: Partly sunny, with a high near 35. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 32 mph.

    High: 35 °F

    Partly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Northwest wind 7 to 15 mph, with gusts as high as 21 mph.

    Low: 15 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 41. South southwest wind 10 to 18 mph, with gusts as high as 34 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 65. Southwest wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Mostly clear, with a low around 38. North northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 68. East northeast wind 5 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 55. South wind 9 to 14 mph, with gusts as high as 23 mph.
Sunday
Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 16 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers. Some thunder is also possible. Low around 25. Breezy, with a southwest wind around 24 mph becoming west northwest after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 35. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 32 mph.
Monday Night
Mostly clear, with a low around 15. Northwest wind 7 to 15 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 40. Northwest wind 5 to 9 mph.
Tuesday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 28. South southeast wind around 9 mph.
Wednesday
Partly sunny, with a high near 57. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 39. South southwest wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 67. South southwest wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.62°N 89.49°W
Last Update:
11:56 pm CDT Mar 12, 2026
Forecast Valid:
12am CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation