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.

Fair

86°F

30°C

Humidity 65%
Wind Speed W 5 mph
Barometer 29.83 in (1009.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Jun 3:56 pm CDT
Extended Forecast for

Dahlgren IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 85. Light southwest wind.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Calm wind becoming south around 6 mph after midnight.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 88. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 88 °F

    Slight Chance
    T-storms then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers after 1am. Low around 68. West southwest wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    Low: 68 °F

    T-storms then
    Showers
    Likely

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. Northwest wind around 6 mph.

    High: 84 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the morning.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. South wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92. South southwest wind 7 to 11 mph.

    High: 92 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 85. Light southwest wind.
Tonight
Partly cloudy, with a low around 72. Calm wind becoming south around 6 mph after midnight.
Wednesday
A slight chance of showers and thunderstorms before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 88. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers after 1am. Low around 68. West southwest wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Juneteenth
Mostly sunny, with a high near 84. Northwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 66. Calm wind.
Friday
Sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 70. South wind around 6 mph.
Saturday
Sunny, with a high near 92. South southwest wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around 75. South wind 6 to 8 mph.
Sunday
Sunny, with a high near 93. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 3 to 6 mph.
Monday
Sunny, with a high near 92. South wind 3 to 6 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dahlgren IL
 38.19°N 88.7°W
Last Update:
3:46 pm CDT Jun 17, 2025
Forecast Valid:
4pm CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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