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.

A Few Clouds

67°F

19°C

Humidity 87%
Wind Speed S 6 mph
Barometer 29.98 in (1015.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 5 Mar 4:56 pm CST
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Calm wind becoming south southeast around 6 mph after midnight. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers before 9am. Mostly sunny, with a high near 76. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 76 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 63. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 71. South southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 64. Calm wind becoming southwest around 6 mph in the morning.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. South southwest wind 3 to 6 mph.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 60. South southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 60 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Calm wind becoming south southeast around 6 mph after midnight. Chance of precipitation is 50%.
Friday
A 20 percent chance of showers before 9am. Mostly sunny, with a high near 76. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 63. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 71. South southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Saturday Night
Partly cloudy, with a low around 41. Northwest wind 5 to 8 mph becoming calm after midnight.
Sunday
Sunny, with a high near 64. Calm wind becoming southwest around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 48. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 75. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 60. South southwest wind around 9 mph, with gusts as high as 18 mph.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. South southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 59. South southwest wind 13 to 16 mph, with gusts as high as 26 mph.
Wednesday
Showers. Mostly cloudy, with a high near 70. South southwest wind 14 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 37. North wind 8 to 13 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 55. North wind 7 to 10 mph becoming east southeast in the afternoon.
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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:
1:46 pm CST Mar 5, 2026
Forecast Valid:
5pm CST Mar 5, 2026-6pm CDT Mar 12, 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