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

38°F

3°C

Humidity 76%
Wind Speed N 10 mph
Barometer 30.26 in (1024.7 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 23 Mar 5:52 am CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Today

    Today: Sunny, with a high near 55. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East northeast wind 6 to 8 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. East southeast wind 5 to 8 mph.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41. East wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Light south southeast wind becoming south 5 to 10 mph in the morning.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59. South wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 45. South southwest wind around 16 mph becoming north after midnight. Winds could gust as high as 24 mph.

    Low: 45 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 54. North wind around 16 mph, with gusts as high as 24 mph.

    High: 54 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 55. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 37. East northeast wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 61. East southeast wind 5 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 41. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 72. Light south southeast wind becoming south 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 59. South wind 9 to 11 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 45. South southwest wind around 16 mph becoming north after midnight. Winds could gust as high as 24 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 54. North wind around 16 mph, with gusts as high as 24 mph.
Friday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 33. North wind 8 to 13 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 57. North wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 37. Northeast wind around 5 mph becoming south southeast after midnight.
Sunday
Mostly sunny, with a high near 64. South wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
4:31 am CDT Mar 23, 2026
Forecast Valid:
6am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation