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.

Overcast

30°F

-1°C

Humidity 88%
Wind Speed NE 3 mph
Barometer 29.92 in (1014.0 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 2 Jan 5:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 37. Northeast wind 3 to 6 mph.

    High: 37 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. Northeast wind 5 to 7 mph.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind 3 to 7 mph.

    High: 41 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23. Calm wind.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 41. Calm wind.

    High: 41 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 55. South southwest wind 7 to 10 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South southwest wind 6 to 8 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. Southwest wind 6 to 10 mph.

    High: 60 °F

    Partly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 37. Northeast wind 3 to 6 mph.
Tonight
Mostly cloudy, with a low around 28. Northeast wind 5 to 7 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind 3 to 7 mph.
Saturday Night
Mostly clear, with a low around 23. Calm wind.
Sunday
Mostly sunny, with a high near 41. Calm wind.
Sunday Night
Partly cloudy, with a low around 30. Calm wind becoming south 5 to 7 mph after midnight.
Monday
Sunny, with a high near 55. South southwest wind 7 to 10 mph.
Monday Night
Partly cloudy, with a low around 43. South southwest wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 60. Southwest wind 6 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 40. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 59. Calm wind becoming southwest around 5 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 44. Calm wind becoming southeast around 5 mph after midnight.
Thursday
A chance of showers. Mostly cloudy, with a high near 60. South southeast wind 6 to 9 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:
4:46 am CST Jan 2, 2026
Forecast Valid:
6am CST Jan 2, 2026-6pm CST Jan 8, 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