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.

A Few Clouds

66°F

19°C

Humidity 25%
Wind Speed W 12 G 24 mph
Barometer 30.22 in (1023.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 19 Apr 2:52 pm CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 67. West northwest wind around 8 mph, with gusts as high as 18 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. West wind around 5 mph becoming light and variable after midnight.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Light and variable wind becoming east around 6 mph.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Southeast wind 5 to 7 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 54. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Southwest wind 6 to 10 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 8 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. South wind 9 to 18 mph, with gusts as high as 28 mph.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 67. West northwest wind around 8 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 41. West wind around 5 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 68. Light and variable wind becoming east around 6 mph.
Monday Night
Mostly clear, with a low around 50. Southeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Clear, with a low around 54. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 8 mph.
Thursday
Sunny, with a high near 80. South wind 9 to 18 mph, with gusts as high as 28 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. South wind 15 to 17 mph, with gusts as high as 24 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South southwest wind 14 to 16 mph, with gusts as high as 24 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. West southwest wind around 9 mph becoming north northwest after midnight.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 72. Northwest wind 8 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:
3:07 pm CDT Apr 19, 2026
Forecast Valid:
3pm CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
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