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.

Thunderstorm in Vicinity

67°F

19°C

Humidity 87%
Wind Speed S 15 G 21 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 7 Mar 2:56 am CST
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 63. South southwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 3pm. Temperature rising to near 69 by noon, then falling to around 60 during the remainder of the day. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 69 °F⇓

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 40. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.

    Low: 40 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 64. Calm wind becoming southwest around 6 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. South southwest wind 3 to 6 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 58. South southwest wind 16 to 18 mph, with gusts as high as 31 mph.

    Low: 58 °F

    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 63. South southwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday
Showers and thunderstorms, mainly before 3pm. Temperature rising to near 69 by noon, then falling to around 60 during the remainder of the day. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 40. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.
Sunday
Sunny, with a high near 64. Calm wind becoming southwest around 6 mph.
Sunday Night
Clear, with a low around 46. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 58. South southwest wind 16 to 18 mph, with gusts as high as 31 mph.
Wednesday
Showers and possibly a thunderstorm before noon, then showers likely. Cloudy, with a high near 68. Breezy, with a south southwest wind 16 to 20 mph becoming north northwest in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 35. North northwest wind 7 to 15 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 53. West northwest wind 6 to 9 mph.
Thursday Night
Mostly cloudy, with a low around 39. West southwest wind 5 to 13 mph becoming south in the evening. Winds could gust as high as 23 mph.
Friday
Mostly cloudy, with a high near 64. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
12:26 am CST Mar 7, 2026
Forecast Valid:
3am CST Mar 7, 2026-6pm CDT Mar 13, 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