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.

Fog/Mist

39°F

4°C

Humidity 100%
Wind Speed Calm
Barometer 30.11 in (1020.1 mb)
Dewpoint 39°F (4°C)
Visibility 3.00 mi
Last update 10 Nov 1:56 am CST
Extended Forecast for

Nason IL

  • Overnight

    Overnight: Clear, with a low around 43. Light west southwest wind.

    Low: 43 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Calm wind becoming west around 5 mph.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, then gradually becoming sunny, with a high near 71. Light and variable wind becoming west 12 to 17 mph in the morning. Winds could gust as high as 20 mph.

    High: 71 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41. Northwest wind 11 to 13 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 52. Breezy, with a north northwest wind 11 to 20 mph.

    High: 52 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. North northwest wind 6 to 13 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 47. North northwest wind 7 to 15 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. North northwest wind around 6 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 43. Light west southwest wind.
Tuesday
Sunny, with a high near 72. Calm wind becoming west around 5 mph.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Veterans Day
Partly sunny, then gradually becoming sunny, with a high near 71. Light and variable wind becoming west 12 to 17 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 41. Northwest wind 11 to 13 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 52. Breezy, with a north northwest wind 11 to 20 mph.
Thursday Night
Mostly clear, with a low around 30. North northwest wind 6 to 13 mph.
Friday
Sunny, with a high near 47. North northwest wind 7 to 15 mph.
Friday Night
Mostly clear, with a low around 25. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 50. Calm wind.
Saturday Night
Mostly clear, with a low around 30. Calm wind.
Sunday
Mostly sunny, with a high near 54. Calm wind becoming south southeast around 6 mph in the morning.
Sunday Night
Partly cloudy, with a low around 33. Light east southeast wind.
Monday
Mostly sunny, with a high near 57. East southeast wind 3 to 6 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:
12:35 am CST Nov 10, 2026
Forecast Valid:
2am CST Nov 10, 2026-6pm CST Nov 16, 2026
 
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