National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

40°F

4°C

Humidity 89%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 18 Mar 11:56 pm CDT
Extended Forecast for

Waltonville IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 43. Light south wind.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. South wind 3 to 6 mph.

    High: 72 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. Calm wind becoming south around 5 mph after midnight.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78. South southwest wind 6 to 9 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. West southwest wind 3 to 6 mph.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. West northwest wind 3 to 6 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. South southwest wind 3 to 8 mph.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39. North wind around 14 mph, with gusts as high as 23 mph.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 43. Light south wind.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. South wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 48. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 78. South southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 51. West southwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 78. West northwest wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 57. South southwest wind 3 to 8 mph.
Sunday
Sunny, with a high near 81. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 39. North wind around 14 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 55. North northeast wind 10 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 34. East northeast wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 59. East southeast wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 41. Southeast wind around 6 mph.
Wednesday
Partly sunny, with a high near 68. South wind 7 to 11 mph, with gusts as high as 18 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:
11:36 pm CDT Mar 18, 2026
Forecast Valid:
12am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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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