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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

83°F

28°C

Humidity 49%
Wind Speed Vrbl 6 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 22 Aug 5:56 pm CDT
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, clear, with a low around 63. Light north northwest wind.

    Low: 63 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 86. Light southeast wind. Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, clear, with a low around 63. Light north northwest wind.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 61. Calm wind.
Monday
Mostly sunny, with a high near 84. Calm wind.
Monday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Tuesday
A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 86. Light southeast wind. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 66. Calm wind.
Wednesday
Mostly sunny, with a high near 88. Calm wind.
Wednesday Night
Partly cloudy, with a low around 67. Calm wind.
Thursday
Sunny, with a high near 89. Calm wind becoming northwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 65. Calm wind.
Friday
Sunny, with a high near 88. Calm wind.
Friday Night
Mostly clear, with a low around 66. Calm wind.
Saturday
Mostly sunny, with a high near 89. Light east southeast wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waltonville IL
 38.2°N 89.03°W
Last Update:
4:56 pm CDT Aug 22, 2026
Forecast Valid:
7pm CDT Aug 22, 2026-6pm CDT Aug 29, 2026
 
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Additional Resources

Radar & Satellite Image

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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