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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Vergennes IL

  • Today

    Today: Patchy fog before 9am. Otherwise, sunny, with a high near 86. Light north northeast wind.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 88. Calm wind.

    High: 88 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. Calm wind.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Light south southwest wind.

    Low: 69 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Light west southwest wind.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 86. Light north northeast wind.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 88. Calm wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 91. Calm wind.
Wednesday Night
Mostly clear, with a low around 69. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Light south southwest wind.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Light west southwest wind.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Light south southwest wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Calm wind.
Sunday
Mostly sunny, with a high near 91. South southwest wind 3 to 7 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:
4:31 am CDT Aug 3, 2026
Forecast Valid:
5am CDT Aug 3, 2026-6pm CDT Aug 9, 2026
 
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