National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

37°F

3°C

Humidity 54%
Wind Speed S 5 mph
Barometer 30.10 in (1019.7 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 4 Jan 6:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • Tonight

    Tonight: Mostly clear, with a low around 33. South wind 3 to 7 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56. South southwest wind 8 to 10 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65. West wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. West wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 47. South wind 6 to 8 mph.

    Low: 47 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 61. South southwest wind 8 to 10 mph.

    High: 61 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 47. South wind around 10 mph.

    Low: 47 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 33. South wind 3 to 7 mph.
Monday
Sunny, with a high near 56. South southwest wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 48. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 65. West wind 6 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 38. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 47. South wind 6 to 8 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 61. South southwest wind 8 to 10 mph.
Thursday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 47. South wind around 10 mph.
Friday
A chance of showers, mainly before noon. Mostly sunny, with a high near 57. South wind around 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 35. West wind around 10 mph.
Saturday
Mostly sunny, with a high near 48. West wind 9 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 26. West northwest wind 8 to 10 mph.
Sunday
Mostly sunny, with a high near 41. West northwest wind 7 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
7:21 pm CST Jan 4, 2026
Forecast Valid:
7pm CST Jan 4, 2026-6pm CST Jan 11, 2026
 
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