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

71°F

22°C

Humidity 96%
Wind Speed NW 5 mph
Barometer 29.99 in (1015.1 mb)
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 15 Jun 2:52 am CDT
Extended Forecast for

Grand Tower IL

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, partly cloudy, with a steady temperature around 71. Calm wind.

    Low: 71 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. Light and variable wind.

    Low: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68. East wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South southwest wind 3 to 8 mph.

    High: 90 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 6 to 10 mph.

    Low: 70 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a steady temperature around 71. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. Light and variable wind.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Calm wind becoming east southeast around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 68. East wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South southwest wind 3 to 8 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 6 to 10 mph.
Juneteenth
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. West southwest wind around 6 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 68. Light and variable wind.
Friday
Sunny, with a high near 90. Calm wind becoming south 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. South wind around 7 mph.
Saturday
Sunny, with a high near 93. South 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 89.52°W
Last Update:
2:30 am CDT Jun 15, 2025
Forecast Valid:
3am CDT Jun 15, 2025-6pm CDT Jun 21, 2025
 
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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