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.

Overcast

79°F

26°C

Humidity 60%
Wind Speed S 17 mph
Barometer 30.01 in (1016.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 13 Apr 1:56 pm CDT
Extended Forecast for

Waltonville IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 85. South southwest wind 13 to 18 mph, with gusts as high as 25 mph.

    High: 85 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • 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 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 79. South southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 79 °F

    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. South southwest wind 5 to 7 mph.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 86 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Partly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 68. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 85. South southwest wind 13 to 18 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
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 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 79. South southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
Mostly clear, with a low around 61. South southwest wind 5 to 7 mph.
Friday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65. South wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 78. South southwest wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 63. West northwest wind 8 to 11 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:
1:26 pm CDT Apr 13, 2026
Forecast Valid:
2pm CDT Apr 13, 2026-6pm CDT Apr 19, 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