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.

Fair

44°F

7°C

Humidity 58%
Wind Speed S 9 mph
Barometer 30.01 in (1016.6 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Mar 11:56 pm CDT
Extended Forecast for

Waltonville IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 44. Breezy, with a south southwest wind 9 to 14 mph increasing to 15 to 20 mph. Winds could gust as high as 34 mph.

    Low: 44 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 62. Breezy, with a southwest wind 14 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.

    High: 62 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. West northwest wind around 6 mph becoming east after midnight.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 66. East wind 7 to 13 mph becoming south southeast in the afternoon. Winds could gust as high as 18 mph.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. South southeast wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 16 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 70%.

    High: 71 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain and snow showers, mainly before 1am. Some thunder is also possible. Low around 24. Breezy, with a south southwest wind 23 to 26 mph becoming west northwest after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 80%.

    Low: 24 °F

    Rain/Snow and
    Breezy

  • Monday

    Monday: A slight chance of snow showers before 1pm. Mostly cloudy, with a high near 32. Breezy, with a west northwest wind 21 to 24 mph, with gusts as high as 36 mph.

    High: 32 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 13. Northwest wind 9 to 17 mph, with gusts as high as 24 mph.

    Low: 13 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 44. Breezy, with a south southwest wind 9 to 14 mph increasing to 15 to 20 mph. Winds could gust as high as 34 mph.
Friday
Partly sunny, with a high near 62. Breezy, with a southwest wind 14 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.
Friday Night
Mostly clear, with a low around 36. West northwest wind around 6 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 66. East wind 7 to 13 mph becoming south southeast in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 53. South southeast wind 8 to 13 mph, with gusts as high as 23 mph.
Sunday
Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 16 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 70%.
Sunday Night
Rain and snow showers, mainly before 1am. Some thunder is also possible. Low around 24. Breezy, with a south southwest wind 23 to 26 mph becoming west northwest after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 80%.
Monday
A slight chance of snow showers before 1pm. Mostly cloudy, with a high near 32. Breezy, with a west northwest wind 21 to 24 mph, with gusts as high as 36 mph.
Monday Night
Mostly clear, with a low around 13. Northwest wind 9 to 17 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 36. West wind around 8 mph.
Tuesday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 25. Southeast wind 6 to 9 mph.
Wednesday
A slight chance of rain and snow showers. Partly sunny, with a high near 54. South wind around 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 38. South southwest wind around 7 mph.
Thursday
Mostly sunny, with a high near 65. South southwest wind 6 to 9 mph.
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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:
11:56 pm CDT Mar 12, 2026
Forecast Valid:
12am CDT Mar 13, 2026-6pm CDT Mar 19, 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