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.

Overcast

33°F

1°C

Humidity 75%
Wind Speed NE 7 mph
Barometer 29.92 in (1014.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 2 Jan 12:56 pm CST
Extended Forecast for

Waltonville IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 37. Northeast wind around 6 mph.

    High: 37 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 28. Northeast wind 3 to 5 mph.

    Low: 28 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind 3 to 6 mph.

    High: 41 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 40. Light and variable wind.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29. Calm wind becoming south around 6 mph after midnight.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 55. South southwest wind 6 to 10 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South southwest wind 6 to 8 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southwest wind 5 to 10 mph.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 37. Northeast wind around 6 mph.
Tonight
Cloudy, with a low around 28. Northeast wind 3 to 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 41. North northeast wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 24. Calm wind.
Sunday
Mostly sunny, with a high near 40. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 29. Calm wind becoming south around 6 mph after midnight.
Monday
Sunny, with a high near 55. South southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 43. South southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 61. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 41. Light and variable wind.
Wednesday
Partly sunny, with a high near 61. Calm wind becoming south southeast around 6 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 48. Calm wind becoming south southeast around 6 mph after midnight.
Thursday
Showers likely. Mostly cloudy, with a high near 62. South southwest wind 6 to 10 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:
12:51 pm CST Jan 2, 2026
Forecast Valid:
1pm CST Jan 2, 2026-6pm CST Jan 8, 2026
 
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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