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

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

52°F

11°C

Humidity 83%
Wind Speed Calm
Barometer 30.01 in (1016.8 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 6 Oct 7:56 pm CDT
Extended Forecast for

3 Miles NNE Dahlgren IL

  • Tonight

    Tonight: Clear, with a low around 44. Calm wind.

    Low: 44 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 51. Light north northeast wind.

    Low: 51 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming east southeast 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55. Southeast wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. Southeast wind around 6 mph.

    Low: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 44. Calm wind.
Wednesday
Sunny, with a high near 87. Calm wind becoming west southwest 5 to 9 mph in the morning.
Wednesday Night
Mostly clear, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 51. Light north northeast wind.
Friday
Sunny, with a high near 83. Calm wind becoming east southeast 5 to 7 mph in the morning.
Friday Night
Clear, with a low around 55. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 87. Light south southeast wind becoming south 6 to 11 mph in the morning.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. Southeast wind around 6 mph.
Sunday
A chance of showers. Partly sunny, with a high near 77. East wind 6 to 11 mph.
Sunday Night
Partly cloudy, with a low around 56. Light and variable wind.
Columbus Day
Partly sunny, with a high near 82. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 57. East wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 82. Southwest wind 5 to 11 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Dahlgren IL
 38.24°N 88.66°W
Last Update:
7:20 pm CDT Oct 6, 2026
Forecast Valid:
8pm CDT Oct 6, 2026-6pm CDT Oct 13, 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