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.

Fair

43°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 30.12 in (1020.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 8 Nov 11:52 pm CST
Extended Forecast for

Grand Tower IL

  • Overnight

    Overnight: Patchy fog after 1am. Otherwise, clear, with a low around 38. Calm wind.

    Low: 38 °F

    Patchy Fog

  • Monday

    Monday: Areas of fog before 9am. Otherwise, sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 42. Light south southwest wind.

    Low: 42 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. Light southwest wind.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. Light south southwest wind.

    Low: 44 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 71 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. North northwest wind 6 to 11 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 55. North northwest wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 55 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 33. North northwest wind 6 to 10 mph.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 1am. Otherwise, clear, with a low around 38. Calm wind.
Monday
Areas of fog before 9am. Otherwise, sunny, with a high near 68. Light and variable wind.
Monday Night
Clear, with a low around 42. Light south southwest wind.
Tuesday
Sunny, with a high near 71. Light southwest wind.
Tuesday Night
Mostly clear, with a low around 44. Light south southwest wind.
Veterans Day
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Calm wind becoming south southwest 5 to 9 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 43. North northwest wind 6 to 11 mph.
Thursday
Partly sunny, with a high near 55. North northwest wind 11 to 16 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 33. North northwest wind 6 to 10 mph.
Friday
Mostly sunny, with a high near 49. North northwest wind 6 to 10 mph.
Friday Night
Mostly clear, with a low around 28. Light north northwest wind.
Saturday
Sunny, with a high near 53. Calm wind becoming northwest around 5 mph.
Saturday Night
Mostly clear, with a low around 32. Calm wind.
Sunday
Sunny, with a high near 62. Calm wind becoming southwest around 5 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.62°N 89.52°W
Last Update:
9:16 pm CST Nov 8, 2026
Forecast Valid:
12am CST Nov 9, 2026-6pm CST Nov 15, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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