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.

N/A

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

Dahlgren IL

  • Today

    Today: Mostly cloudy, with a high near 33. South wind 5 to 8 mph.

    High: 33 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 29. South wind around 6 mph becoming west after midnight.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 46. West southwest wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 46 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 22. North northwest wind 6 to 9 mph.

    Low: 22 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 33. North northeast wind around 6 mph becoming calm in the afternoon.

    High: 33 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 21. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 21 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50. South southwest wind 3 to 8 mph.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Light south southwest wind.

    High: 55 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 33. South wind 5 to 8 mph.
Tonight
Mostly cloudy, with a steady temperature around 29. South wind around 6 mph becoming west after midnight.
Friday
Increasing clouds, with a high near 46. West southwest wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 22. North northwest wind 6 to 9 mph.
Saturday
Sunny, with a high near 33. North northeast wind around 6 mph becoming calm in the afternoon.
Saturday Night
Mostly cloudy, with a low around 21. Calm wind becoming south southeast around 6 mph after midnight.
Sunday
Mostly sunny, with a high near 50. South southwest wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 28. Calm wind.
Monday
Sunny, with a high near 55. Light south southwest wind.
Monday Night
Partly cloudy, with a low around 40. South southwest wind 3 to 6 mph.
Tuesday
A slight chance of showers. Partly sunny, with a high near 61. South southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 41. South southwest wind around 7 mph becoming west northwest after midnight.
Wednesday
A chance of showers. Mostly cloudy, with a high near 55. West northwest wind 7 to 9 mph becoming south in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dahlgren IL
 38.19°N 88.7°W
Last Update:
9:42 am CST Feb 5, 2026
Forecast Valid:
10am CST Feb 5, 2026-6pm CST Feb 11, 2026
 
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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