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

39°F

4°C

Humidity 86%
Wind Speed N 3 mph
Barometer 29.91 in (1013.0 mb)
Dewpoint 35°F (2°C)
Visibility 7.00 mi
Last update 1 Jan 4:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 41. Northeast wind 3 to 7 mph.

    High: 41 °F

    Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 29. Northeast wind around 6 mph.

    Low: 29 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind around 7 mph.

    High: 41 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 42. Light and variable wind.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. Calm wind becoming south southwest 5 to 9 mph in the evening.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. South wind 8 to 10 mph.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. Calm wind.
Friday
Cloudy, with a high near 41. Northeast wind 3 to 7 mph.
Friday Night
Cloudy, with a low around 29. Northeast wind around 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind around 7 mph.
Saturday Night
Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 42. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 33. Calm wind becoming south southwest 5 to 9 mph in the evening.
Monday
Mostly sunny, with a high near 56. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 45. South wind 8 to 10 mph.
Tuesday
Partly sunny, with a high near 62. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 41. South southwest wind 5 to 7 mph becoming northwest after midnight.
Wednesday
Partly sunny, with a high near 58. Northwest wind around 6 mph becoming south southeast in the afternoon.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 44. South southeast wind 3 to 6 mph.
Thursday
A chance of showers. Mostly cloudy, with a high near 60. South southeast wind 6 to 9 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:
5:06 pm CST Jan 1, 2026
Forecast Valid:
5pm CST Jan 1, 2026-6pm CST Jan 8, 2026
 
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Additional Resources

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