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

66°F

19°C

Humidity 36%
Wind Speed NW 12 mph
Barometer 30.25 in (1024.3 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 6 Apr 3:52 pm CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 66. North wind around 5 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. North wind around 7 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. East northeast wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. East southeast wind 6 to 8 mph.

    Low: 37 °F

    Partly Cloudy

  • 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: Partly cloudy, with a low around 53. South wind around 10 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 75. South wind around 11 mph, with gusts as high as 18 mph.

    High: 75 °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 chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 77. South wind 7 to 10 mph.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 66. North wind around 5 mph.
Tonight
Mostly clear, with a low around 39. North wind around 7 mph.
Tuesday
Mostly sunny, with a high near 59. East northeast wind 9 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 37. 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
Partly cloudy, with a low around 53. South wind around 10 mph.
Thursday
Sunny, with a high near 75. South wind around 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 54. South wind around 8 mph.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 77. South wind 7 to 10 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind around 6 mph becoming north northeast in the evening.
Saturday
A slight chance of showers and thunderstorms. Partly 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 60. Southeast wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 83. South wind 8 to 16 mph, with gusts as high as 24 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:
4:16 pm CDT Apr 6, 2026
Forecast Valid:
4pm CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation