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.

Light Rain

44°F

7°C

Humidity 76%
Wind Speed Vrbl 5 G 17 mph
Barometer 29.96 in (1015.2 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 12 Nov 2:56 pm CST
Extended Forecast for

Nason IL

  • This Afternoon

    This Afternoon: Isolated showers before 5pm. Partly sunny, with a steady temperature around 46. Light east northeast wind becoming north 5 to 9 mph. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 46 °F

    Isolated
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 33. Northwest wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 47. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming clear, with a low around 27. North northwest wind 3 to 8 mph.

    Low: 27 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 50. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 27. Calm wind.

    Low: 27 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 52. Calm wind.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54. Calm wind.

    High: 54 °F

    Sunny

Detailed Forecast

This Afternoon
Isolated showers before 5pm. Partly sunny, with a steady temperature around 46. Light east northeast wind becoming north 5 to 9 mph. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 33. Northwest wind 8 to 13 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 47. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 27. North northwest wind 3 to 8 mph.
Saturday
Sunny, with a high near 50. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 27. Calm wind.
Sunday
Sunny, with a high near 52. Calm wind.
Sunday Night
Mostly clear, with a low around 31. Calm wind.
Monday
Sunny, with a high near 54. Calm wind.
Monday Night
Clear, with a low around 32. Calm wind.
Tuesday
Sunny, with a high near 56. Light and variable wind.
Tuesday Night
Clear, with a low around 33. Calm wind.
Wednesday
Sunny, with a high near 60. Calm wind becoming south around 6 mph 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:
3:20 pm CST Nov 12, 2026
Forecast Valid:
3pm CST Nov 12, 2026-6pm CST Nov 18, 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