National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

A Few Clouds

94°F

34°C

Humidity 46%
Wind Speed SW 9 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 12 Aug 1:56 pm CDT
Extended Forecast for

Waltonville IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 93. South wind around 6 mph.

    High: 93 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 71. Light and variable wind.

    Low: 71 °F

    Chance
    T-storms then
    Patchy Fog

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. Light north northeast wind.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89. Light north wind.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Light southeast wind.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 98. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 98 °F

    Hot

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 93. South wind around 6 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 71. Light and variable wind.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Calm wind becoming northwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 69. Light north northeast wind.
Thursday
Mostly sunny, with a high near 89. Light north wind.
Thursday Night
Mostly clear, with a low around 70. Calm wind.
Friday
Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. Light southeast wind.
Saturday
Sunny and hot, with a high near 98. Calm wind becoming south southwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. Light south southeast wind.
Sunday
Mostly sunny and hot, with a high near 99. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 74. Light and variable wind.
Monday
Mostly sunny, with a high near 96. Calm wind becoming east around 6 mph 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:
12:01 pm CDT Aug 12, 2025
Forecast Valid:
2pm CDT Aug 12, 2025-6pm CDT Aug 18, 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