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.

Fog/Mist

40°F

4°C

Humidity 97%
Wind Speed E 6 mph
Barometer 30.10 in (1019.9 mb)
Dewpoint 39°F (4°C)
Visibility 2.50 mi
Wind Chill36°F (2°C)
Last update 3 Mar 6:56 am CST
Extended Forecast for

3 Miles SE Dahlgren IL

  • Today

    Today: A chance of showers and thunderstorms before 9am, then a chance of showers between 9am and noon, then a chance of showers and thunderstorms after noon. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 65. Light and variable wind becoming southwest 5 to 8 mph. Chance of precipitation is 50%.

    High: 65 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 53. Light and variable wind becoming east around 6 mph in the evening. Chance of precipitation is 80%.

    Low: 53 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 68. South southeast wind 5 to 9 mph becoming east in the morning. Chance of precipitation is 90%.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 56. South southwest wind 5 to 8 mph. Chance of precipitation is 80%.

    Low: 56 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 70. South southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 58. South wind around 6 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms before noon. Partly sunny, with a high near 78. South southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 78 °F

    Chance
    T-storms then
    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 61 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 69. South southwest wind 6 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 69 °F

    Showers

Detailed Forecast

Today
A chance of showers and thunderstorms before 9am, then a chance of showers between 9am and noon, then a chance of showers and thunderstorms after noon. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 65. Light and variable wind becoming southwest 5 to 8 mph. Chance of precipitation is 50%.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 53. Light and variable wind becoming east around 6 mph in the evening. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 68. South southeast wind 5 to 9 mph becoming east in the morning. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 56. South southwest wind 5 to 8 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm. High near 70. South southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 58. South wind around 6 mph. Chance of precipitation is 50%.
Friday
A 30 percent chance of showers and thunderstorms before noon. Partly sunny, with a high near 78. South southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 13 mph, with gusts as high as 23 mph.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 69. South southwest wind 6 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 47. West northwest wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers. Partly sunny, with a high near 64. Calm wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 51. South southwest wind around 6 mph.
Monday
A slight chance of showers. Sunny, with a high near 71. West southwest wind 6 to 9 mph.
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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:
6:36 am CST Mar 3, 2026
Forecast Valid:
7am CST Mar 3, 2026-6pm CDT Mar 9, 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