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.

Mostly Cloudy

75°F

24°C

Humidity 88%
Wind Speed NW 6 mph
Barometer 29.99 in (1015.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 14 Jun 9:52 pm CDT
Extended Forecast for

Vergennes IL

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 68. Calm wind becoming north around 5 mph after midnight.

    Low: 68 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 84. North wind 3 to 5 mph.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 68. Light and variable wind.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 83. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 87. South southwest wind 6 to 9 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 7 to 9 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. South southwest wind 6 to 10 mph.

    Low: 72 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 68. Calm wind becoming north around 5 mph after midnight.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 84. North wind 3 to 5 mph.
Sunday Night
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 68. Light and variable wind.
Monday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 83. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 87. South southwest wind 6 to 9 mph. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 7 to 9 mph.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. South southwest wind 6 to 10 mph.
Juneteenth
A chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 88. West northwest wind around 7 mph.
Thursday Night
Mostly clear, with a low around 69. Light and variable wind.
Friday
Sunny, with a high near 90. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. South wind around 6 mph.
Saturday
Sunny, with a high near 93. South southwest wind 6 to 10 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:
9:01 pm CDT Jun 14, 2025
Forecast Valid:
10pm CDT Jun 14, 2025-6pm CDT Jun 21, 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