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

32°F

0°C

Humidity 75%
Wind Speed N 8 mph
Barometer 30.22 in (1023.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 1 Mar 2:56 am CST
Extended Forecast for

Waltonville IL

  • Overnight

    Overnight: Mostly clear, with a low around 32. North northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 50. Northeast wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 50 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain showers likely before 2am, then rain, possibly mixed with snow showers between 2am and 3am, then rain showers after 3am. Low around 35. East northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 35 °F

    Showers
    Likely then
    Rain/Snow

  • Monday

    Monday: Showers likely, mainly before noon. Cloudy, with a high near 47. East wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    High: 47 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

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

    Low: 43 °F

    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.

    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

Detailed Forecast

Overnight
Mostly clear, with a low around 32. North northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday
Increasing clouds, with a high near 50. Northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
Rain showers likely before 2am, then rain, possibly mixed with snow showers between 2am and 3am, then rain showers after 3am. Low around 35. East northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Monday
Showers likely, mainly before noon. Cloudy, with a high near 47. East wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 43. Light and variable 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.
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:
1:52 am CST Mar 1, 2026
Forecast Valid:
3am 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