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.

Fair

61°F

16°C

Humidity 22%
Wind Speed E 9 mph
Barometer 30.04 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 17 Nov 12:50 pm CST
Extended Forecast for

Vergennes IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 61. Southeast wind 7 to 9 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a steady temperature around 55. South wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly before noon. Partly sunny, with a high near 71. Southwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Increasing clouds, with a low around 49. North wind 3 to 6 mph.

    Low: 49 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 48. Light and variable wind.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after noon. High near 66. South wind 3 to 8 mph. Chance of precipitation is 90%.

    High: 66 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 56. South southwest wind 5 to 7 mph.

    Low: 56 °F

    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67. South wind 7 to 11 mph becoming west in the afternoon.

    High: 67 °F

    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 61. Southeast wind 7 to 9 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a steady temperature around 55. South wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday
Showers and thunderstorms likely, mainly before noon. Partly sunny, with a high near 71. Southwest wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
A 20 percent chance of showers before midnight. Increasing clouds, with a low around 49. North wind 3 to 6 mph.
Wednesday
Mostly cloudy, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.
Wednesday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 48. Light and variable wind.
Thursday
Showers, with thunderstorms also possible after noon. High near 66. South wind 3 to 8 mph. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 56. South southwest wind 5 to 7 mph.
Friday
Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67. South wind 7 to 11 mph becoming west in the afternoon.
Friday Night
A chance of showers, mainly before midnight. Mostly cloudy, with a low around 45. East wind 6 to 9 mph becoming north northwest after midnight.
Saturday
Mostly sunny, with a high near 58. Northwest wind 5 to 9 mph.
Saturday Night
Partly cloudy, with a low around 40. Light northwest wind.
Sunday
Mostly sunny, with a high near 60. Calm wind becoming west southwest around 6 mph in the morning.
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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:
1:06 pm CST Nov 17, 2025
Forecast Valid:
1pm CST Nov 17, 2025-6pm CST Nov 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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