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

68°F

20°C

Humidity 63%
Wind Speed N 5 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 1 Sep 11:56 pm CDT
Extended Forecast for

Waltonville IL

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 56. Southwest wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Low: 56 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 74. North northwest wind 8 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 52. Light and variable wind.

    Low: 52 °F

    Clear

  • Friday

    Friday: Mostly sunny, with a high near 84. South southwest wind 6 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 49. Northwest wind 5 to 9 mph becoming light north after midnight.

    Low: 49 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Calm wind.
Tuesday
Mostly sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 58. Calm wind.
Wednesday
Mostly sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 56. Southwest wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 74. North northwest wind 8 to 10 mph.
Thursday Night
Clear, with a low around 52. Light and variable wind.
Friday
Mostly sunny, with a high near 84. South southwest wind 6 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 49. Northwest wind 5 to 9 mph becoming light north after midnight.
Saturday
Sunny, with a high near 78. Calm wind becoming north northwest 5 to 9 mph in the morning.
Saturday Night
Mostly clear, with a low around 49. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79. Calm wind becoming north northeast 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 50. North northeast wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 80. Calm wind becoming east 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waltonville IL
 38.23°N 89.03°W
Last Update:
11:16 pm CDT Sep 1, 2025
Forecast Valid:
12am CDT Sep 2, 2025-6pm CDT Sep 8, 2025
 
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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