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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Partly Cloudy

68°F

20°C

Humidity 90%
Wind Speed Vrbl 5 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 May 2:56 am CDT
Extended Forecast for

5 Miles SSW Dahlgren IL

  • Overnight

    Overnight: Partly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 21 mph.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 84. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 84 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 1am, then a chance of showers. Low around 61. West southwest wind 5 to 8 mph becoming calm. Chance of precipitation is 90%.

    Low: 61 °F

    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers between 10am and 1pm. Mostly cloudy, with a high near 72. North northeast wind 8 to 10 mph.

    High: 72 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 55. North northeast wind around 9 mph.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 72. East northeast wind around 9 mph.

    High: 72 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. East northeast wind 6 to 9 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 75. East wind around 8 mph becoming west southwest in the afternoon.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 61. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 61 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 21 mph.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 84. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Showers and thunderstorms before 1am, then a chance of showers. Low around 61. West southwest wind 5 to 8 mph becoming calm. Chance of precipitation is 90%.
Wednesday
A 30 percent chance of showers between 10am and 1pm. Mostly cloudy, with a high near 72. North northeast wind 8 to 10 mph.
Wednesday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 55. North northeast wind around 9 mph.
Thursday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 72. East northeast wind around 9 mph.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. East northeast wind 6 to 9 mph. Chance of precipitation is 70%.
Friday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 75. East wind around 8 mph becoming west southwest in the afternoon.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 61. West southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light east wind.
Memorial Day
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Dahlgren IL
 38.13°N 88.73°W
Last Update:
1:26 am CDT May 19, 2026
Forecast Valid:
3am CDT May 19, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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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