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.

Fair

84°F

29°C

Humidity 38%
Wind Speed SW 6 mph
Barometer 29.98 in (1014.7 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 11 Oct 3:52 pm CDT
Extended Forecast for

Vergennes IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. Light west wind.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 61. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 61 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Partly sunny, then gradually becoming sunny, with a high near 91. Southwest wind 5 to 13 mph, with gusts as high as 18 mph.

    High: 91 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Southwest wind around 8 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Southwest wind 7 to 11 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. South southwest wind 5 to 7 mph.

    Low: 70 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 85. Southwest wind 3 to 6 mph. Chance of precipitation is 90%.

    High: 85 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Light and variable wind becoming south southeast 5 to 9 mph in the morning.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 84. Light west wind.
Tonight
Mostly clear, with a low around 61. Calm wind becoming south southwest around 5 mph after midnight.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 91. Southwest wind 5 to 13 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 66. Southwest wind around 8 mph.
Tuesday
Sunny, with a high near 93. Southwest wind 7 to 11 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. South southwest wind 5 to 7 mph.
Wednesday
Showers and possibly a thunderstorm. High near 85. Southwest wind 3 to 6 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Calm wind.
Thursday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Light and variable wind becoming south southeast 5 to 9 mph in the morning.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. West wind 6 to 10 mph.
Friday
Partly sunny, with a high near 68. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 41. North northwest wind 9 to 18 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 60. North wind 9 to 13 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vergennes IL
 37.9°N 89.33°W
Last Update:
2:01 pm CDT Oct 11, 2026
Forecast Valid:
4pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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