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

44°F

7°C

Humidity 55%
Wind Speed N 12 G 18 mph
Barometer 30.37 in (1029.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 1 Mar 11:56 am CST
Extended Forecast for

Waltonville IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 50. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 50 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain before 2am, then rain, possibly mixed with snow between 2am and 3am, then rain after 3am. Low around 35. East northeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain then
    Rain/Snow

  • Monday

    Monday: Rain likely, mainly before 11am, then a slight chance of drizzle after 4pm. Cloudy, with a high near 47. East wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 47 °F

    Rain Likely
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Showers likely after midnight. Cloudy, with a low around 43. Calm wind becoming south southeast 5 to 9 mph after midnight. Chance of precipitation is 60%.

    Low: 43 °F

    Cloudy then
    Showers
    Likely

  • Tuesday

    Tuesday: A 50 percent chance of showers. Mostly cloudy, with a high near 69. South southwest wind 8 to 15 mph, with gusts as high as 22 mph.

    High: 69 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 57. South wind around 8 mph. Chance of precipitation is 60%.

    Low: 57 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 70. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. South southwest wind around 8 mph.

    Low: 55 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 69. South southwest wind 8 to 11 mph.

    High: 69 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 50. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.
Tonight
Rain before 2am, then rain, possibly mixed with snow between 2am and 3am, then rain after 3am. Low around 35. East northeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday
Rain likely, mainly before 11am, then a slight chance of drizzle after 4pm. Cloudy, with a high near 47. East wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Monday Night
Showers likely after midnight. Cloudy, with a low around 43. Calm wind becoming south southeast 5 to 9 mph after midnight. Chance of precipitation is 60%.
Tuesday
A 50 percent chance of showers. Mostly cloudy, with a high near 69. South southwest wind 8 to 15 mph, with gusts as high as 22 mph.
Tuesday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 57. South wind around 8 mph. Chance of precipitation is 60%.
Wednesday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 70. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. South southwest wind around 8 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 69. South southwest wind 8 to 11 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. South wind 7 to 9 mph, with gusts as high as 18 mph.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. South southwest wind 9 to 15 mph, with gusts as high as 22 mph.
Friday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 55. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely. Cloudy, with a high near 66. South southwest wind 8 to 11 mph, with gusts as high as 20 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:
11:02 am CST Mar 1, 2026
Forecast Valid:
12pm CST Mar 1, 2026-6pm CST Mar 7, 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