Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

41°F

5°C

Humidity 62%
Wind Speed SW 9 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 12 Jan 11:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • Overnight

    Overnight: Mostly clear, with a low around 35. South southwest wind 8 to 10 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers, mainly after midnight.  Mostly cloudy, with a low around 40. Southwest wind 6 to 8 mph becoming northwest after midnight.

    Low: 40 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 45. Breezy, with a north northwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 45 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18. Blustery, with a north northwest wind 11 to 20 mph, with gusts as high as 28 mph.

    Low: 18 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 32. North northwest wind 5 to 10 mph becoming southwest in the afternoon.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. South southwest wind 5 to 14 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 45. West southwest wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 45 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. West wind around 11 mph.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 35. South southwest wind 8 to 10 mph.
Tuesday
Sunny, with a high near 61. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 40. Southwest wind 6 to 8 mph becoming northwest after midnight.
Wednesday
Mostly cloudy, with a high near 45. Breezy, with a north northwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 18. Blustery, with a north northwest wind 11 to 20 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 32. North northwest wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 24. South southwest wind 5 to 14 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 45. West southwest wind 11 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 20. West wind around 11 mph.
Saturday
Partly sunny, with a high near 31. West wind 10 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 12. West northwest wind around 10 mph.
Sunday
Sunny, with a high near 27. West northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 14. West southwest wind around 8 mph.
M.L.King Day
Sunny, with a high near 36. West southwest wind 8 to 11 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
10:26 pm CST Jan 12, 2026
12am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database