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.

A Few Clouds

63°F

17°C

Humidity 97%
Wind Speed SW 9 mph
Barometer 29.91 in (1012.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 10 Mar 3:56 am CDT
Extended Forecast for

3 Miles SSE Dahlgren IL

  • Today

    Today: Mostly cloudy, with a high near 79. South southwest wind 9 to 17 mph, with gusts as high as 25 mph.

    High: 79 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Cloudy, with a low around 65. South southwest wind 16 to 18 mph, with gusts as high as 28 mph.

    Low: 65 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 4pm, then showers likely. Temperature rising to near 69 by 11am, then falling to around 52 during the remainder of the day. Breezy, with a southwest wind 17 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.

    High: 69 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Showers
    Likely and
    Breezy then
    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind around 6 mph becoming west southwest in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph.

    Low: 42 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 63. Southwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 63 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40. Northwest wind around 6 mph becoming east after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. East wind 7 to 14 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 79. South southwest wind 9 to 17 mph, with gusts as high as 25 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Cloudy, with a low around 65. South southwest wind 16 to 18 mph, with gusts as high as 28 mph.
Wednesday
Showers and possibly a thunderstorm before 4pm, then showers likely. Temperature rising to near 69 by 11am, then falling to around 52 during the remainder of the day. Breezy, with a southwest wind 17 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Thursday
Sunny, with a high near 54. North northwest wind around 6 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph.
Friday
Partly sunny, with a high near 63. Southwest wind 11 to 18 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 40. Northwest wind around 6 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 67. East wind 7 to 14 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 55. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 66. Breezy, with a south southwest wind 16 to 21 mph becoming west northwest in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 26. Blustery, with a northwest wind 17 to 21 mph, with gusts as high as 29 mph.
Monday
A slight chance of snow showers. Mostly sunny, with a high near 37. Northwest wind around 14 mph, with gusts as high as 22 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Dahlgren IL
 38.15°N 88.67°W
Last Update:
4:36 am CDT Mar 10, 2026
Forecast Valid:
4am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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