National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

42°F

6°C

Humidity 85%
Wind Speed SW 3 mph
Barometer 30.26 in (1025.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 19 Apr 7:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Sunny, with a high near 66. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming calm after midnight.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 65. Calm wind becoming east around 5 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Calm wind becoming south southeast around 6 mph in the evening.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. Southwest wind 6 to 9 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind around 6 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. South wind 6 to 15 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 66. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 65. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 49. Calm wind becoming south southeast around 6 mph in the evening.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 77. Southwest wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 6 mph.
Thursday
Sunny, with a high near 81. South wind 6 to 15 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. South wind around 11 mph, with gusts as high as 21 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. South southwest wind 11 to 15 mph, with gusts as high as 22 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. West southwest wind 8 to 10 mph becoming northwest after midnight.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 71. North northwest wind 9 to 11 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:
8:26 am CDT Apr 19, 2026
Forecast Valid:
8am CDT Apr 19, 2026-6pm CDT Apr 25, 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