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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Overcast

73°F

23°C

Humidity 90%
Wind Speed Vrbl 5 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 14 Oct 12:56 pm CDT
Extended Forecast for

Dahlgren IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 3pm, then a slight chance of showers and thunderstorms after 5pm. Steady temperature around 78. West wind around 6 mph becoming north northwest. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 86. Light and variable wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 18 mph.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 3am, then a chance of showers between 3am and 4am. Increasing clouds, with a low around 51. Southwest wind 8 to 17 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 62. Breezy, with a northwest wind 18 to 23 mph, with gusts as high as 29 mph.

    High: 62 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39. North northwest wind 11 to 17 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 62. North northeast wind 7 to 10 mph.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37. Calm wind.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 70. Calm wind becoming south southeast around 6 mph in the morning.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 3pm, then a slight chance of showers and thunderstorms after 5pm. Steady temperature around 78. West wind around 6 mph becoming north northwest. Chance of precipitation is 80%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Calm wind.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 86. Light and variable wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
A chance of showers and thunderstorms before 3am, then a chance of showers between 3am and 4am. Increasing clouds, with a low around 51. Southwest wind 8 to 17 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.
Friday
Partly sunny, with a high near 62. Breezy, with a northwest wind 18 to 23 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 39. North northwest wind 11 to 17 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 62. North northeast wind 7 to 10 mph.
Saturday Night
Clear, with a low around 37. Calm wind.
Sunday
Sunny, with a high near 70. Calm wind becoming south southeast around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 43. Calm wind.
Monday
Mostly sunny, with a high near 72. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 47. Calm wind.
Tuesday
Mostly sunny, with a high near 76. Calm wind becoming south southeast around 5 mph 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:
12:46 pm CDT Oct 14, 2026
Forecast Valid:
1pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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