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.

Fog/Mist

59°F

15°C

Humidity 100%
Wind Speed S 8 mph
Barometer 29.84 in (1010.9 mb)
Dewpoint 59°F (15°C)
Visibility 3.00 mi
Last update 27 Dec 6:56 pm CST
Extended Forecast for

Waltonville IL

  • Tonight

    Tonight: A 20 percent chance of showers after 5am. Patchy fog between midnight and 4am. Otherwise, cloudy, with a temperature rising to around 65 by 5am. South southwest wind 9 to 11 mph, with gusts as high as 24 mph.

    Low: 59 °F⇑

    Patchy Fog
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Patchy fog between 8am and 10am. High near 69. Breezy, with a south southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 80%.

    High: 69 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Showers
    and Breezy

  • Sunday Night

    Sunday Night: Rain showers likely before 11pm, then a slight chance of snow showers between 11pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 21. Blustery, with a west northwest wind 22 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 21 °F

    Blustery.
    Rain/Snow
    Likely then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 33 mph.

    High: 28 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Northwest wind 11 to 16 mph, with gusts as high as 25 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 32. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 32 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. West southwest wind 3 to 6 mph.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. West wind 6 to 10 mph.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 27. West wind around 7 mph.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers after 5am. Patchy fog between midnight and 4am. Otherwise, cloudy, with a temperature rising to around 65 by 5am. South southwest wind 9 to 11 mph, with gusts as high as 24 mph.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Patchy fog between 8am and 10am. High near 69. Breezy, with a south southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 80%.
Sunday Night
Rain showers likely before 11pm, then a slight chance of snow showers between 11pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 21. Blustery, with a west northwest wind 22 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Mostly sunny, with a high near 28. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 33 mph.
Monday Night
Partly cloudy, with a low around 17. Northwest wind 11 to 16 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 32. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 25. West southwest wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 43. West wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 27. West wind around 7 mph.
New Year's Day
Mostly sunny, with a high near 40. Northwest wind 6 to 9 mph.
Thursday Night
Partly cloudy, with a low around 20. North wind 3 to 5 mph.
Friday
Partly sunny, with a high near 39. North northeast wind 5 to 8 mph becoming south southwest in the afternoon.
Friday Night
A slight chance of rain or freezing rain. Mostly cloudy, with a low around 30. South wind 5 to 7 mph.
Saturday
Mostly cloudy, with a high near 47. South wind 7 to 9 mph.
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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:
4:21 pm CST Dec 27, 2025
Forecast Valid:
7pm CST Dec 27, 2025-6pm CST Jan 3, 2026
 
Forecast Discussion
 
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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