Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Light Rain
45°F
7°C
| Humidity | 97% |
| Wind Speed | SW 7 mph |
| Barometer | 29.78 in (1008.4 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 9.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 14 Jan 1:52 am CST |
Extended Forecast for
Grand Tower IL
Overnight
Low: 42 °F
Chance
ShowersWednesday
High: 44 °F⇓
Mostly Cloudy
then
Decreasing
Clouds and
BreezyWednesday Night
Low: 19 °F
Clear
Thursday
High: 35 °F
Sunny
Thursday Night
Low: 26 °F
Mostly Cloudy
Friday
High: 46 °F
Partly Sunny
Friday Night
Low: 22 °F
Mostly Cloudy
Saturday
High: 32 °F
Mostly Sunny
Saturday Night
Low: 11 °F
Partly Cloudy
Detailed Forecast
Overnight
A 50 percent chance of showers, mainly before 4am. Cloudy, with a low around 42. West southwest wind around 6 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a temperature falling to around 33 by 5pm. Breezy, with a north northwest wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.
Wednesday Night
Clear, with a low around 19. North northwest wind 7 to 15 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 35. North northwest wind around 6 mph becoming south southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 26. South wind 6 to 13 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 46. West wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 22. West wind around 10 mph.
Saturday
Mostly sunny, with a high near 32. West northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 11. North northwest wind around 8 mph.
Sunday
Sunny, with a high near 27. Northwest wind 7 to 10 mph becoming west southwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 16. Southwest wind around 9 mph.
M.L.King Day
Mostly sunny, with a high near 35. West northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 14. Northwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 37. West southwest wind 3 to 8 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grand Tower IL
37.64°N 89.52°W
37.64°N 89.52°W
1:16 am CST Jan 14, 2026
2am CST Jan 14, 2026-6pm CST Jan 20, 2026
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