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

33°F

1°C

Humidity 92%
Wind Speed Calm
Barometer 30.19 in (1022.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 12 Nov 11:56 pm CST
Extended Forecast for

Dahlgren IL

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 39. West southwest wind around 5 mph becoming calm.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 45. South southeast wind 3 to 6 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind 6 to 9 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. South southwest wind 6 to 9 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75. Southwest wind 10 to 17 mph, with gusts as high as 23 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. Southwest wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62. Northwest wind 6 to 10 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. Light and variable wind.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 39. West southwest wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 45. South southeast wind 3 to 6 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 56. South southwest wind 6 to 9 mph.
Saturday
Mostly sunny, with a high near 75. Southwest wind 10 to 17 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 47. Southwest wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph.
Sunday
Sunny, with a high near 62. Northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 37. Light and variable wind.
Monday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59. Light and variable wind becoming east southeast 5 to 9 mph in the morning.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 44. East southeast wind 7 to 9 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 60. Southeast wind 7 to 11 mph becoming west northwest in the afternoon.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 42. East wind around 6 mph becoming light and variable.
Wednesday
A chance of showers. Mostly cloudy, with a high near 57. South wind 5 to 8 mph.
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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:
11:16 pm CST Nov 12, 2025
Forecast Valid:
12am CST Nov 13, 2025-6pm CST Nov 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