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.

Fair

45°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 30.12 in (1020.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 9 Oct 4:56 am CDT
Extended Forecast for

Dahlgren IL

  • Today

    Today: Sunny, with a high near 88. Light southeast wind becoming south southeast 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 58. Light southeast wind.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A slight chance of showers before 2pm, then a chance of showers after 4pm. Cloudy, with a high near 76. Light east wind becoming east northeast 9 to 14 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    High: 76 °F

    Cloudy then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 57. East northeast wind 7 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 77. Northwest wind 5 to 9 mph.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 88. Light southwest wind increasing to 6 to 11 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South southwest wind 8 to 10 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. West southwest wind 7 to 13 mph.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 88. Light southeast wind becoming south southeast 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 58. Light southeast wind.
Saturday
A slight chance of showers before 2pm, then a chance of showers after 4pm. Cloudy, with a high near 76. Light east wind becoming east northeast 9 to 14 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 57. East northeast wind 7 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Sunday
Partly sunny, with a high near 77. Northwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 56. Calm wind.
Columbus Day
Sunny, with a high near 88. Light southwest wind increasing to 6 to 11 mph in the afternoon.
Monday Night
Mostly clear, with a low around 64. South southwest wind 8 to 10 mph.
Tuesday
Sunny, with a high near 88. West southwest wind 7 to 13 mph.
Tuesday Night
Mostly clear, with a low around 60. West southwest wind 5 to 9 mph becoming east northeast after midnight.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 83. East wind 6 to 10 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 61. Southeast wind 6 to 8 mph.
Thursday
A chance of showers. Mostly sunny, with a high near 82. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dahlgren IL
 38.19°N 88.7°W
Last Update:
1:26 am CDT Oct 9, 2026
Forecast Valid:
5am CDT Oct 9, 2026-6pm CDT Oct 15, 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