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.

Light Rain

N/A

Humidity NA
Wind Speed SW 17 mph
Barometer 29.64 in
Dewpoint N/A
Visibility 10.00 mi
Last update 10 Dec 3:56 am CST
Extended Forecast for

Nason IL

  • Overnight

    Overnight: A 20 percent chance of rain before 5am. Cloudy, with a steady temperature around 43. Southwest wind around 17 mph, with gusts as high as 30 mph.

    Low: 43 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 45 by 8am, then falling to around 37 during the remainder of the day. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.

    High: 45 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 18 mph.

    Low: 25 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 39. Northwest wind around 6 mph becoming south in the afternoon.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 33. South southeast wind 5 to 8 mph.

    Low: 33 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 45. Southwest wind 7 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 45 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. North northwest wind 5 to 9 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 36. North wind around 6 mph.

    High: 36 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 10. North wind 5 to 9 mph.

    Low: 10 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain before 5am. Cloudy, with a steady temperature around 43. Southwest wind around 17 mph, with gusts as high as 30 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 45 by 8am, then falling to around 37 during the remainder of the day. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.
Wednesday Night
Mostly cloudy, with a low around 25. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 18 mph.
Thursday
Partly sunny, with a high near 39. Northwest wind around 6 mph becoming south in the afternoon.
Thursday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 33. South southeast wind 5 to 8 mph.
Friday
Partly sunny, with a high near 45. Southwest wind 7 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 21. North northwest wind 5 to 9 mph.
Saturday
Mostly cloudy, with a high near 36. North wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 10. North wind 5 to 9 mph.
Sunday
Sunny, with a high near 24. North wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 11. North northeast wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 37. Light east southeast wind becoming south 5 to 9 mph in the morning.
Monday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 26. South southwest wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 45. South wind 5 to 7 mph.
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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:
3:16 am CST Dec 10, 2025
Forecast Valid:
4am CST Dec 10, 2025-6pm CST Dec 16, 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