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.

A Few Clouds

80°F

27°C

Humidity 67%
Wind Speed Vrbl 7 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 22 Aug 10:56 am CDT
Extended Forecast for

4 Miles SSE Dahlgren IL

  • Today

    Today: Sunny, with a high near 86. Northwest wind 8 to 13 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 62. North northwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Clear

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, sunny, with a high near 84. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Calm wind becoming east around 6 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Northwest wind 8 to 13 mph.
Tonight
Clear, with a low around 62. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 7am. Otherwise, sunny, with a high near 84. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 58. Calm wind.
Monday
Mostly sunny, with a high near 83. Light and variable wind.
Monday Night
Partly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 85. Calm wind becoming east around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 88. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. Calm wind.
Thursday
Sunny, with a high near 89. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 65. Calm wind.
Friday
Sunny, with a high near 89. Calm wind becoming north around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Dahlgren IL
 38.15°N 88.67°W
Last Update:
8:26 am CDT Aug 22, 2026
Forecast Valid:
10am CDT Aug 22, 2026-6pm CDT Aug 28, 2026
 
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Additional Resources

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Chance of Precipitation