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

73°F

23°C

Humidity 71%
Wind Speed SW 20 G 26 mph
Barometer 29.93 in (1013.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 14 Apr 10:56 pm CDT
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 83 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 80. Southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 80 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 7pm. Mostly clear, with a low around 60. Southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. South southwest wind 11 to 17 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 80. Southwest wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
A chance of thunderstorms before 7pm. Mostly clear, with a low around 60. Southwest wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. South southwest wind 11 to 17 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 62. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 39. North northwest wind 3 to 7 mph.
Monday
Sunny, with a high near 67. East southeast wind 5 to 8 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 46. South southeast wind around 5 mph.
Tuesday
Sunny, with a high near 72. South wind 6 to 11 mph, with gusts as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Waltonville IL
 38.23°N 89.03°W
Last Update:
9:42 pm CDT Apr 14, 2026
Forecast Valid:
11pm CDT Apr 14, 2026-6pm CDT Apr 21, 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