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 NW 5 mph
Barometer 30.11 in
Dewpoint N/A
Visibility 10.00 mi
Last update 2 Dec 1:56 pm CST
Extended Forecast for

Nason IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 30. Light and variable wind.

    High: 30 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 23. Calm wind becoming south around 5 mph after midnight.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. Light and variable wind becoming north 5 to 10 mph in the evening.

    Low: 19 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. North wind 5 to 10 mph becoming light north northeast in the afternoon.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17. Calm wind.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

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

    Low: 24 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 42. Calm wind becoming west around 6 mph.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 30. Light and variable wind.
Tonight
Partly cloudy, with a steady temperature around 23. Calm wind becoming south around 5 mph after midnight.
Wednesday
Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 19. Light and variable wind becoming north 5 to 10 mph in the evening.
Thursday
Mostly sunny, with a high near 29. North wind 5 to 10 mph becoming light north northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 17. Calm wind.
Friday
Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.
Friday Night
Partly cloudy, with a low around 24. Light southwest wind.
Saturday
Mostly sunny, with a high near 42. Calm wind becoming west around 6 mph.
Saturday Night
Mostly cloudy, with a low around 25. Calm wind becoming east around 5 mph after midnight.
Sunday
A slight chance of showers. Mostly cloudy, with a high near 39. East wind 5 to 8 mph becoming north in the afternoon.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 22. North wind around 6 mph.
Monday
Partly sunny, with a high near 36. 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:
1:51 pm CST Dec 2, 2025
Forecast Valid:
2pm 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