National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

76°F

24°C

Humidity 48%
Wind Speed NE 13 mph
Barometer 30.13 in (1020.5 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 25 May 11:56 am CDT
Extended Forecast for

3 Miles SW Dahlgren IL

  • Memorial Day

    Memorial Day: Mostly cloudy, with a high near 80. East northeast wind around 7 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Light northeast wind.

    Low: 60 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. East northeast wind 3 to 6 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Light east southeast wind. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Light and variable wind. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. East wind 3 to 7 mph.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 66. East wind 3 to 5 mph.

    Low: 66 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. East wind around 7 mph.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Memorial Day
Mostly cloudy, with a high near 80. East northeast wind around 7 mph.
Tonight
Increasing clouds, with a low around 60. Light northeast wind.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. East northeast wind 3 to 6 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Light east southeast wind. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Light and variable wind. Chance of precipitation is 60%.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. East wind 3 to 7 mph.
Thursday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 66. East wind 3 to 5 mph.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. East wind around 7 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East wind 3 to 6 mph.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. East northeast wind 6 to 10 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. East northeast wind 6 to 8 mph.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. North northeast wind 8 to 10 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dahlgren IL
 38.17°N 88.72°W
Last Update:
11:41 am CDT May 25, 2026
Forecast Valid:
12pm CDT May 25, 2026-6pm CDT May 31, 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