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

56°F

13°C

Humidity 44%
Wind Speed SW 14 mph
Barometer 29.75 in (1007.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 13 Jan 4:56 pm CST
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: A chance of showers before 1am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 40. West southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 50%.

    Low: 40 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north northwest wind 11 to 21 mph, with gusts as high as 30 mph.

    High: 42 °F⇓

    Decreasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 18. Northwest wind 7 to 14 mph, with gusts as high as 26 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 32. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 25. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 24 mph.

    Low: 25 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Friday

    Friday: Partly sunny, with a high near 45. West wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 45 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. West northwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 27. West northwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 11. West northwest wind around 9 mph.

    Low: 11 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers before 1am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 40. West southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north northwest wind 11 to 21 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 18. Northwest wind 7 to 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 32. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Thursday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 25. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 24 mph.
Friday
Partly sunny, with a high near 45. West wind 11 to 17 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 20. West northwest wind around 11 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 27. West northwest wind 10 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 11. West northwest wind around 9 mph.
Sunday
Sunny, with a high near 29. West southwest wind 8 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 16. West southwest wind 7 to 10 mph, with gusts as high as 18 mph.
M.L.King Day
Mostly sunny, with a high near 34. West northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 12. Northwest wind 5 to 7 mph.
Tuesday
Sunny, with a high near 31. Northwest wind 5 to 9 mph becoming south in the afternoon.
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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:
3:17 pm CST Jan 13, 2026
Forecast Valid:
5pm CST Jan 13, 2026-6pm CST Jan 20, 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