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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

71°F

22°C

Humidity 79%
Wind Speed N 3 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 20 Jun 9:56 pm CDT
Extended Forecast for

Waltonville IL

Flood Watch June 21, 01:00pm until June 22, 07:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

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

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 5pm. Increasing clouds, with a high near 88. Breezy, with a light southeast wind becoming south southwest 15 to 20 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 70%.

    High: 88 °F

    Chance
    T-storms then
    T-storms
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 2am, then showers and possibly a thunderstorm, mainly after 2am. Some of the storms could produce heavy rainfall. Low around 69. Southwest wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 69 °F

    Heavy Rain
    then Showers

  • Monday

    Monday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 80. West wind 8 to 10 mph becoming north northwest in the afternoon. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 66. Calm wind.
Sunday
Showers and thunderstorms likely, mainly before 5pm. Increasing clouds, with a high near 88. Breezy, with a light southeast wind becoming south southwest 15 to 20 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms before 2am, then showers and possibly a thunderstorm, mainly after 2am. Some of the storms could produce heavy rainfall. Low around 69. Southwest wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Monday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 80. West wind 8 to 10 mph becoming north northwest in the afternoon. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Calm wind.
Tuesday Night
Mostly clear, with a low around 63. Calm wind.
Wednesday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 63. Light and variable wind.
Thursday
Mostly sunny, with a high near 84. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 63. Light north wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Light south wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Light south wind becoming south southwest 5 to 9 mph in the morning.
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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:
9:31 pm CDT Jun 20, 2026
Forecast Valid:
10pm CDT Jun 20, 2026-6pm CDT Jun 27, 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