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.

Mostly Cloudy

31°F

-1°C

Humidity 72%
Wind Speed Calm
Barometer 30.27 in (1026.2 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 21 Feb 8:56 pm CST
Extended Forecast for

2 Miles W Nason IL

  • Tonight

    Tonight: Mostly clear, with a low around 23. Light and variable wind becoming northwest 8 to 13 mph in the evening. Winds could gust as high as 25 mph.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 33. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 33 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17. Northwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 34. Northwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18. Light and variable wind.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 49. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 49 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58. West southwest wind 9 to 11 mph.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after midnight. Mostly cloudy, with a low around 36. Southwest wind around 9 mph becoming north after midnight.

    Low: 36 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 23. Light and variable wind becoming northwest 8 to 13 mph in the evening. Winds could gust as high as 25 mph.
Sunday
Sunny, with a high near 33. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 17. Northwest wind around 14 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 34. Northwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 18. Light and variable wind.
Tuesday
Partly sunny, with a high near 49. South southwest wind 5 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a high near 58. West southwest wind 9 to 11 mph.
Wednesday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 36. Southwest wind around 9 mph becoming north after midnight.
Thursday
A chance of showers. Partly sunny, with a high near 51. Northwest wind 7 to 10 mph.
Thursday Night
Mostly clear, with a low around 28. Northwest wind around 6 mph becoming south southwest after midnight.
Friday
Sunny, with a high near 57. South southwest wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around 38. South southwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 60. South southwest wind 7 to 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Nason IL
 38.18°N 89.01°W
Last Update:
9:36 pm CST Feb 21, 2026
Forecast Valid:
9pm CST Feb 21, 2026-6pm CST Feb 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation