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.

Partly Cloudy

68°F

20°C

Humidity 81%
Wind Speed S 17 G 25 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 9 Mar 6:52 pm CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Tonight

    Tonight: Partly cloudy, with a low around 62. South southwest wind 10 to 16 mph, with gusts as high as 24 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 10 percent chance of showers after 5pm. Partly sunny, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 64. South southwest wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 71. South southwest wind around 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 34. Breezy, with a north northwest wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 29 mph.

    Low: 34 °F

    Slight Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 28 mph.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 66. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 66 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42. West northwest wind around 7 mph becoming east after midnight.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 62. South southwest wind 10 to 16 mph, with gusts as high as 24 mph.
Tuesday
A 10 percent chance of showers after 5pm. Partly sunny, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 64. South southwest wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 71. South southwest wind around 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 34. Breezy, with a north northwest wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 28 mph.
Friday
Partly sunny, with a high near 66. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 42. West northwest wind around 7 mph becoming east after midnight.
Saturday
Sunny, with a high near 70. East southeast wind 8 to 13 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 53. South southwest wind 13 to 16 mph, with gusts as high as 25 mph.
Sunday
A chance of showers. Partly sunny, with a high near 67. Breezy, with a south southwest wind 16 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A chance of showers. Partly cloudy, with a low around 30. Blustery, with a north northwest wind 16 to 20 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 44. North northwest wind 11 to 14 mph, with gusts as high as 20 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:
3:01 pm CDT Mar 9, 2026
Forecast Valid:
6pm CDT Mar 9, 2026-6pm CDT Mar 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation