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

53°F

12°C

Humidity 96%
Wind Speed Calm
Barometer 29.67 in (1005.0 mb)
Dewpoint 52°F (11°C)
Visibility 7.00 mi
Last update 18 Feb 11:56 pm CST
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Calm wind becoming south around 6 mph after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 68. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 60%.

    High: 68 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 9pm. Mostly clear, with a low around 41. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 52. West wind 6 to 16 mph, with gusts as high as 24 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. Calm wind becoming north around 5 mph after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 46. North wind 5 to 9 mph.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 40. Northwest wind 11 to 17 mph, with gusts as high as 24 mph.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 21. North northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. Calm wind becoming south around 6 mph after midnight.
Thursday
Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 68. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers before 9pm. Mostly clear, with a low around 41. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 52. West wind 6 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 32. Calm wind becoming north around 5 mph after midnight.
Saturday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 46. North wind 5 to 9 mph.
Saturday Night
Mostly clear, with a low around 24. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 40. Northwest wind 11 to 17 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 21. North northwest wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 39. North northwest wind 5 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 20. Light and variable wind.
Tuesday
Mostly sunny, with a high near 48. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 36. South southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Wednesday
A chance of showers. Partly sunny, with a high near 57. Southwest wind 11 to 16 mph, with gusts as high as 24 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:
11:01 pm CST Feb 18, 2026
Forecast Valid:
11pm CST Feb 18, 2026-6pm CST Feb 25, 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