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.

A Few Clouds

27°C

80°F

Humidity 82%
Wind Speed SE 6 km/h
Barometer 1016.7 mb (30.04 in)
Dewpoint 23°C (74°F)
Visibility 16 km
Heat Index29°C (85°F)
Last update 13 Jul 9:52 am CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Today

    Today: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 31. South southwest wind 8 to 16 km/h. Chance of precipitation is 70%.

    High: 31 °C

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before 1am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Chance
    T-storms and
    Patchy Fog

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 31. Calm wind becoming east 5 to 8 km/h in the afternoon.

    High: 31 °C

    Areas Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 32. Light south southeast wind becoming south southwest 6 to 11 km/h in the morning. Chance of precipitation is 50%.

    High: 32 °C

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 23. South southwest wind 5 to 10 km/h becoming calm.

    Low: 23 °C

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33. South southwest wind 8 to 13 km/h.

    High: 33 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23. Southwest wind 8 to 10 km/h.

    Low: 23 °C

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33. West southwest wind 10 to 13 km/h.

    High: 33 °C

    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 31. South southwest wind 8 to 16 km/h. Chance of precipitation is 70%.
Tonight
A 40 percent chance of showers and thunderstorms before 1am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 22. Calm wind.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 31. Calm wind becoming east 5 to 8 km/h in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Calm wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 32. Light south southeast wind becoming south southwest 6 to 11 km/h in the morning. Chance of precipitation is 50%.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 23. South southwest wind 5 to 10 km/h becoming calm.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33. South southwest wind 8 to 13 km/h.
Wednesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23. Southwest wind 8 to 10 km/h.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33. West southwest wind 10 to 13 km/h.
Thursday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 22. West wind 5 to 10 km/h becoming southeast in the evening.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 31. Northeast wind 8 to 10 km/h becoming southwest in the afternoon.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Northeast wind 5 to 10 km/h becoming calm after midnight.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Southwest wind 5 to 10 km/h.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
9:46 am CDT Jul 13, 2025
Forecast Valid:
10am CDT Jul 13, 2025-6pm CDT Jul 19, 2025
 
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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