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

31°F

-1°C

Humidity 96%
Wind Speed Calm
Barometer 29.94 in (1014.5 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 26 Feb 10:56 pm CST
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: Clear, with a low around 34. Calm wind.

    Low: 34 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 68. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 68 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41. South wind 5 to 8 mph becoming northeast after midnight.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. Northeast wind 5 to 8 mph becoming south in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 32. East wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 32 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and snow showers after noon. Mostly cloudy, with a high near 44. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 44 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow showers likely. Cloudy, with a low around 31. East northeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 31 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow showers before noon. Mostly cloudy, with a high near 43. East northeast wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 43 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 31. East wind around 6 mph.

    Low: 31 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 34. Calm wind.
Friday
Sunny, with a high near 68. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 41. South wind 5 to 8 mph becoming northeast after midnight.
Saturday
Mostly sunny, with a high near 64. Northeast wind 5 to 8 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 32. East wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
A chance of rain and snow showers after noon. Mostly cloudy, with a high near 44. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
Rain and snow showers likely. Cloudy, with a low around 31. East northeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Monday
A chance of rain and snow showers before noon. Mostly cloudy, with a high near 43. East northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 31. East wind around 6 mph.
Tuesday
A chance of showers. Cloudy, with a high near 49. East wind 6 to 8 mph becoming south in the afternoon.
Tuesday Night
Showers likely. Cloudy, with a low around 39. South southeast wind 5 to 7 mph.
Wednesday
A chance of showers. Cloudy, with a high near 59. South wind 7 to 10 mph.
Wednesday Night
Showers likely. Cloudy, with a low around 50. South wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Showers likely. Cloudy, with a high near 66. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waltonville IL
 38.23°N 89.03°W
Last Update:
9:13 pm CST Feb 26, 2026
Forecast Valid:
11pm CST Feb 26, 2026-6pm CST Mar 5, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation