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.

Partly Cloudy

75°F

24°C

Humidity 58%
Wind Speed SW 13 mph
Barometer 29.70 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 Nov 12:52 pm CST
Extended Forecast for

Vergennes IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 77. Southwest wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 45. West southwest wind 7 to 9 mph becoming north northwest after midnight.

    Low: 45 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 60. North northwest wind 6 to 10 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 61. Calm wind becoming southeast 5 to 9 mph in the morning.

    High: 61 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 47. Southeast wind 7 to 10 mph. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 73. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 73 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 52. South southwest wind 6 to 8 mph becoming north northeast after midnight.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 67. East northeast wind 5 to 7 mph becoming southwest in the afternoon.

    High: 67 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 77. Southwest wind 8 to 16 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 45. West southwest wind 7 to 9 mph becoming north northwest after midnight.
Sunday
Sunny, with a high near 60. North northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 35. Calm wind.
Monday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 61. Calm wind becoming southeast 5 to 9 mph in the morning.
Monday Night
Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 47. Southeast wind 7 to 10 mph. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 73. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 52. South southwest wind 6 to 8 mph becoming north northeast after midnight.
Wednesday
A chance of showers. Mostly cloudy, with a high near 67. East northeast wind 5 to 7 mph becoming southwest in the afternoon.
Wednesday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 54. East southeast wind 3 to 7 mph.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68. South southeast wind 7 to 11 mph.
Thursday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 55. South wind 9 to 11 mph.
Friday
Showers likely. Partly sunny, with a high near 66. Southwest wind 11 to 15 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vergennes IL
 37.9°N 89.33°W
Last Update:
12:51 pm CST Nov 15, 2025
Forecast Valid:
12pm CST Nov 15, 2025-6pm CST Nov 21, 2025
 
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Additional Resources

Radar & Satellite Image

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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