National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

A Few Clouds

87°F

31°C

Humidity 59%
Wind Speed SW 15 G 28 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 15 Oct 3:52 pm CDT
Extended Forecast for

4 Miles NNW Vergennes IL

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a steady temperature around 83. Southwest wind around 13 mph, with gusts as high as 18 mph.

    High: 83 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 3am, then a chance of showers. Increasing clouds, with a low around 47. Southwest wind 7 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Cloudy through mid morning, then becoming mostly sunny, with a high near 59. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 29 mph.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 9 to 15 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 60. North northeast wind 6 to 8 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 5am. Otherwise, clear, with a low around 34. Calm wind.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.

    High: 71 °F

    Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a steady temperature around 83. Southwest wind around 13 mph, with gusts as high as 18 mph.
Tonight
Showers and thunderstorms likely before 3am, then a chance of showers. Increasing clouds, with a low around 47. Southwest wind 7 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Friday
Cloudy through mid morning, then becoming mostly sunny, with a high near 59. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 9 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 60. North northeast wind 6 to 8 mph.
Saturday Night
Areas of frost after 5am. Otherwise, clear, with a low around 34. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 38. Calm wind.
Monday
Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 41. Calm wind.
Tuesday
Mostly sunny, with a high near 76. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Wednesday
Sunny, with a high near 78. Light and variable wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Vergennes IL
 37.95°N 89.39°W
Last Update:
1:51 pm CDT Oct 15, 2026
Forecast Valid:
4pm CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
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Additional Resources

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