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.

Partly Cloudy

74°F

23°C

Humidity 60%
Wind Speed E 5 mph
Barometer 30.25 in (1024.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 11 Apr 2:52 pm CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 75. South southeast wind around 5 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Southeast wind 5 to 7 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 82. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 82 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 82. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. South southwest wind 15 to 17 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 14 to 16 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 75. South southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 59. Southeast wind 5 to 7 mph.
Sunday
Increasing clouds, with a high near 82. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 82. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 68. South southwest wind 15 to 17 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 86. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.
Tuesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 14 to 16 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 8 to 11 mph.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 61. South wind 5 to 7 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
2:06 pm CDT Apr 11, 2026
Forecast Valid:
3pm CDT Apr 11, 2026-6pm CDT Apr 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