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.

Fair

88°F

31°C

Humidity 34%
Wind Speed E 7 mph
Barometer 30.12 in (1020.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 29 Sep 4:56 pm CDT
Extended Forecast for

Nason IL

  • Tonight

    Tonight: Clear, with a low around 61. East northeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Northeast wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. East wind 3 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60. East wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 87. Southeast wind 3 to 6 mph.

    High: 87 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light east southeast wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. South wind 3 to 5 mph.

    Low: 59 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 61. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 57. Northeast wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 88. East wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 60. East wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 87. Southeast wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 61. Light east southeast wind.
Friday
Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.
Friday Night
Clear, with a low around 59. South wind 3 to 5 mph.
Saturday
Sunny, with a high near 85. Light south wind increasing to 5 to 9 mph in the morning.
Saturday Night
Mostly clear, with a low around 59. South southeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 86. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 60. South wind 3 to 6 mph.
Monday
Sunny, with a high near 87. South wind 3 to 8 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:
4:30 pm CDT Sep 29, 2025
Forecast Valid:
5pm CDT Sep 29, 2025-6pm CDT Oct 6, 2025
 
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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