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.

Overcast

81°F

27°C

Humidity 82%
Wind Speed W 7 mph
Barometer 29.92 in (1013.1 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 15 Oct 3:56 pm CDT
Extended Forecast for

Waltonville IL

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm. Partly sunny, with a steady temperature around 83. Southwest wind around 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a chance of showers. Increasing clouds, with a low around 47. Southwest wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 59. Breezy, with a northwest wind 17 to 23 mph, with gusts as high as 29 mph.

    High: 59 °F

    Decreasing
    Clouds and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 17 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 61. North northeast wind 6 to 9 mph.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 68. Calm wind becoming southeast around 6 mph in the morning.

    High: 68 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.

    High: 72 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm. Partly sunny, with a steady temperature around 83. Southwest wind around 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tonight
Showers and thunderstorms likely before 1am, then a chance of showers. Increasing clouds, with a low around 47. Southwest wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 59. Breezy, with a northwest wind 17 to 23 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 17 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 61. North northeast wind 6 to 9 mph.
Saturday Night
Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 68. Calm wind becoming southeast around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 76. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Wednesday
Sunny, with a high near 79. Light east 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:
1:51 pm CDT Oct 15, 2026
Forecast Valid:
4pm CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
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Additional Resources

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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