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.

Fog/Mist

41°F

5°C

Humidity 96%
Wind Speed E 3 mph
Barometer 30.08 in (1018.9 mb)
Dewpoint 40°F (4°C)
Visibility 1.25 mi
Last update 3 Mar 6:52 am CST
Extended Forecast for

Grand Tower IL

  • Today

    Today: A 40 percent chance of showers, mainly before 5pm. Partly sunny, with a high near 70. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

    High: 70 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 55. South wind around 6 mph becoming east in the evening. Chance of precipitation is 70%.

    Low: 55 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 70. South southwest wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 57. South wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then a chance of showers and thunderstorms after noon. High near 71. Southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 58. South wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Cloudy, with a high near 71. South southwest wind 7 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 71 °F

    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers, mainly before 5pm. Partly sunny, with a high near 70. Light and variable wind becoming south southwest 5 to 10 mph in the morning.
Tonight
A chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 55. South wind around 6 mph becoming east in the evening. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 70. South southwest wind 5 to 10 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 57. South wind 6 to 8 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then a chance of showers and thunderstorms after noon. High near 71. Southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 58. South wind 5 to 7 mph. Chance of precipitation is 40%.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind around 11 mph, with gusts as high as 21 mph.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Cloudy, with a high near 71. South southwest wind 7 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 47. West northwest wind around 6 mph becoming calm in the evening.
Sunday
A slight chance of showers. Partly sunny, with a high near 67. Calm wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 52. Southwest wind around 6 mph.
Monday
A chance of showers. Sunny, with a high near 74. Southwest wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.64°N 89.49°W
Last Update:
6:36 am CST Mar 3, 2026
Forecast Valid:
7am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
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