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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

70°F

21°C

Humidity 79%
Wind Speed S 15 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 15 Apr 5:52 am CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Today

    Today: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 64. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. South southwest wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 14 mph, with gusts as high as 21 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 72 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 40. West northwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 64. West northwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 64 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 64. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. South southwest wind 5 to 7 mph. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 14 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 40. West northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 64. West northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 40. Northwest wind 5 to 8 mph becoming southeast after midnight.
Monday
Sunny, with a high near 70. South wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 48. South wind around 7 mph.
Tuesday
Sunny, with a high near 76. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
1:51 am CDT Apr 15, 2026
Forecast Valid:
6am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation