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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

A Few Clouds

75°F

24°C

Humidity 96%
Wind Speed Calm
Barometer 29.98 in (1015.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Last update 11 Jul 7:56 pm CDT
Extended Forecast for

2 Miles SW Dahlgren IL

Flood Watch July 11, 09:07pm until July 12, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 11, 09:07pm until July 12, 01:00am

    NOW until 1:00am Sun

    Flood Watch

  • Tonight

    Low: 68 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 83. North northeast wind 7 to 11 mph.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. North northeast wind 5 to 9 mph becoming light.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 86. North northeast wind 6 to 11 mph.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88. East northeast wind 3 to 8 mph.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. East wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Calm wind.

    High: 89 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 68. North northeast wind 3 to 6 mph. Chance of precipitation is 30%.
Sunday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 83. North northeast wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 67. North northeast wind 5 to 9 mph becoming light.
Monday
Sunny, with a high near 86. North northeast wind 6 to 11 mph.
Monday Night
Mostly clear, with a low around 68. North northeast wind 5 to 7 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 88. East northeast wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 70. East wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 89. Calm wind.
Wednesday Night
Mostly clear, with a low around 71. Calm wind.
Thursday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 90. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 73. Calm wind.
Friday
Sunny, with a high near 91. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. Light southwest wind.
Saturday
Sunny, with a high near 92. West southwest wind 3 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Dahlgren IL
 38.17°N 88.7°W
Last Update:
8:11 pm CDT Jul 11, 2026
Forecast Valid:
9pm CDT Jul 11, 2026-6pm CDT Jul 18, 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