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

43°F

6°C

Humidity 86%
Wind Speed Calm
Barometer 30.30 in (1026.2 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 7 Apr 1:52 am CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Overnight

    Overnight: Partly cloudy, with a low around 39. North northeast wind 5 to 7 mph.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. East northeast wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 38. East southeast wind 6 to 8 mph.

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. South wind 8 to 10 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. South wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. South wind around 8 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. South wind 7 to 10 mph.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. West northwest wind around 5 mph becoming light and variable.

    Low: 57 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 39. North northeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 58. East northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 38. East southeast wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 73. South wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 52. South wind 8 to 10 mph.
Thursday
Sunny, with a high near 76. South wind 10 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 54. South wind around 8 mph.
Friday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. South wind 7 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. West northwest wind around 5 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 79. East wind 5 to 7 mph becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 59. East southeast wind around 7 mph.
Sunday
Mostly sunny, with a high near 82. South wind 8 to 16 mph, with gusts as high as 25 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind 13 to 16 mph, with gusts as high as 25 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 28 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:
2:31 am CDT Apr 7, 2026
Forecast Valid:
2am CDT Apr 7, 2026-6pm CDT Apr 13, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation