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

80°F

27°C

Humidity 41%
Wind Speed NE 6 mph
Barometer 30.05 in (1017.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 13 Oct 2:56 pm CDT
Extended Forecast for

Nason IL

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. Light northeast wind.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 53. Light east northeast wind.

    Low: 53 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56. East northeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Light east wind becoming east southeast 5 to 9 mph in the morning.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. East southeast wind around 7 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 84. South wind 6 to 11 mph.

    High: 84 °F

    Partly Sunny

Detailed Forecast

Columbus Day
Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph.
Tonight
Mostly clear, with a low around 55. Light northeast wind.
Tuesday
Sunny, with a high near 83. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 53. Light east northeast wind.
Wednesday
Sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 56. East northeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 80. Light east wind becoming east southeast 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a low around 54. East southeast wind around 7 mph.
Friday
Partly sunny, with a high near 84. South wind 6 to 11 mph.
Friday Night
Mostly clear, with a low around 63. South wind 8 to 10 mph.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. Southwest wind 8 to 10 mph.
Sunday
A chance of showers. Sunny, with a high near 72. West northwest wind 10 to 16 mph, with gusts as high as 20 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:
1:31 pm CDT Oct 13, 2025
Forecast Valid:
2pm CDT Oct 13, 2025-6pm CDT Oct 19, 2025
 
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Additional Resources

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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