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 S 6 mph
Barometer 30.13 in
Dewpoint N/A
Visibility 10.00 mi
Last update 2 Dec 11:56 pm CST
Extended Forecast for

Nason IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 24. South southwest wind around 5 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 43. South southwest wind 5 to 10 mph.

    High: 43 °F

    Gradual
    Clearing

  • 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

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. Calm wind becoming east around 5 mph after midnight.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 24. South southwest wind around 5 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, 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 after noon. 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.
Monday Night
A slight chance of freezing rain. Mostly cloudy, with a low around 26. Light and variable wind becoming southwest around 6 mph after midnight.
Tuesday
A slight chance of showers. Partly sunny, with a high near 43. West southwest wind 6 to 10 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nason IL
 38.18°N 88.98°W
Last Update:
12:16 am CST Dec 3, 2025
Forecast Valid:
12am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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