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

48°F

9°C

Humidity 89%
Wind Speed NE 7 mph
Barometer 30.36 in (1028.3 mb)
Dewpoint 45°F (7°C)
Visibility 9.00 mi
Wind Chill45°F (7°C)
Last update 11 Apr 6:56 am CDT
Extended Forecast for

Waltonville IL

  • Today

    Today: Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 74. East northeast wind around 7 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

    High: 74 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Southeast wind around 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 81. Breezy, with a south southwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 81 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    Low: 67 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. South southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 74. East northeast wind around 7 mph becoming southeast in the afternoon. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 59. Southeast wind around 6 mph.
Sunday
Increasing clouds, with a high near 81. Breezy, with a south southwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Monday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. South southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 85. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Southwest wind 8 to 10 mph.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. South southwest wind around 7 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. South southwest wind 6 to 11 mph, with gusts as high as 18 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:
3:41 am CDT Apr 11, 2026
Forecast Valid:
7am CDT Apr 11, 2026-6pm CDT Apr 17, 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