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

N/A

Humidity NA
Wind Speed Calm
Barometer 30.06 in
Dewpoint N/A
Visibility 10.00 mi
Last update 2 Dec 4:56 am CST
Extended Forecast for

Nason IL

  • Today

    Today: Partly sunny, with a high near 32. North northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 32 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 42. South southwest wind 5 to 10 mph.

    High: 42 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 18. Light and variable wind becoming north northwest 5 to 10 mph in the evening. Winds could gust as high as 18 mph.

    Low: 18 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 27. North wind 5 to 10 mph becoming light in the afternoon. Winds could gust as high as 18 mph.

    High: 27 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 14. Calm wind.

    Low: 14 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 38. Calm wind becoming south southwest around 6 mph in the morning.

    High: 38 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24. Light and variable wind.

    Low: 24 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 42. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 32. North northwest wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.
Wednesday
Increasing clouds, with a high near 42. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 18. Light and variable wind becoming north northwest 5 to 10 mph in the evening. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 27. North wind 5 to 10 mph becoming light in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 14. Calm wind.
Friday
Mostly sunny, with a high near 38. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 24. Light and variable wind.
Saturday
Partly sunny, with a high near 42. Light and variable wind becoming west 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 25. East northeast wind 3 to 6 mph.
Sunday
Mostly cloudy, with a high near 38. North wind 6 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 20. North wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 38. North wind 5 to 7 mph becoming south in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nason IL
 38.18°N 88.98°W
Last Update:
5:16 am CST Dec 2, 2025
Forecast Valid:
5am CST Dec 2, 2025-6pm CST Dec 8, 2025
 
Forecast Discussion
 
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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