Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog

48°F

9°C

Humidity 100%
Wind Speed NE 6 mph
Barometer 29.96 in (1014.6 mb)
Dewpoint 48°F (9°C)
Visibility 0.25 mi
Wind Chill45°F (7°C)
Last update 27 Dec 5:52 am CST
Extended Forecast for

Grand Tower IL

Dense Fog Advisory until December 27, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until December 27, 09:00am

    NOW until 9:00am Sat

    Dense Fog Advisory

  • Today

    High: 67 °F

    Areas Dense
    Fog then
    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, with a steady temperature around 65. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Cloudy

  • Sunday

    Sunday: Showers, mainly after 4pm.  High near 72. South southwest wind 11 to 18 mph, with gusts as high as 30 mph.  Chance of precipitation is 80%.

    High: 72 °F

    Mostly Cloudy
    then Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 9pm.  Low around 23. Breezy, with a southwest wind 20 to 23 mph becoming west northwest in the evening. Winds could gust as high as 32 mph.  Chance of precipitation is 90%.

    Low: 23 °F

    Showers and
    Breezy then
    Slight Chance
    Showers and
    Blustery

  • Monday

    Monday: Sunny, with a high near 30. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 30 °F

    Sunny and
    Blustery then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. Northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 35. Northwest wind 6 to 8 mph becoming west southwest in the afternoon.

    High: 35 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 24. Southwest wind around 6 mph.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Today
Areas of dense fog before 9am. Otherwise, mostly cloudy, with a high near 67. Light and variable wind becoming south southeast 5 to 8 mph in the morning.
Tonight
Cloudy, with a steady temperature around 65. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday
Showers, mainly after 4pm. High near 72. South southwest wind 11 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Sunday Night
Showers, mainly before 9pm. Low around 23. Breezy, with a southwest wind 20 to 23 mph becoming west northwest in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 90%.
Monday
Sunny, with a high near 30. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 19. Northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 35. Northwest wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 24. Southwest wind around 6 mph.
Wednesday
Mostly sunny, with a high near 45. West southwest wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 26. Southwest wind around 6 mph becoming northwest after midnight.
New Year's Day
Mostly sunny, with a high near 38. North northwest wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 18. North wind 3 to 5 mph.
Friday
Partly sunny, with a high near 35. Light and variable wind becoming north around 6 mph in the morning.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Tower IL
 37.64°N 89.52°W
3:16 am CST Dec 27, 2025
6am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
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