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.

Partly Cloudy

75°F

24°C

Humidity 84%
Wind Speed W 5 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 28 Jun 1:56 am CDT
Extended Forecast for

3 Miles SE Dahlgren IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Mostly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. Light south southwest wind.

    Low: 71 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms. High near 87. Calm wind becoming southwest around 6 mph in the morning. Chance of precipitation is 80%.

    High: 87 °F

    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 88. West southwest wind 5 to 8 mph. Chance of precipitation is 80%.

    High: 88 °F

    Chance
    Showers then
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 70. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

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

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Mostly cloudy, with a low around 73. Calm wind.
Saturday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. Light south southwest wind.
Sunday
Showers and thunderstorms. High near 87. Calm wind becoming southwest around 6 mph in the morning. Chance of precipitation is 80%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind around 5 mph becoming calm in the evening.
Monday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 88. West southwest wind 5 to 8 mph. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 70. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 67. Calm wind.
Wednesday
Sunny, with a high near 89. Light west wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 91. Calm wind becoming west southwest around 5 mph.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. Calm wind.
Independence Day
A slight chance of showers and thunderstorms. Sunny, with a high near 92. Calm wind becoming south southwest around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Dahlgren IL
 38.17°N 88.64°W
Last Update:
1:46 am CDT Jun 28, 2025
Forecast Valid:
2am CDT Jun 28, 2025-6pm CDT Jul 4, 2025
 
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