National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

62°F

17°C

Humidity 50%
Wind Speed SW 9 mph
Barometer 30.07 in (1018.9 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 8 Nov 3:56 pm CST
Extended Forecast for

Nason IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 63. West southwest wind around 5 mph.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 40. West southwest wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Clear then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming south southwest around 6 mph.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 49. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 49 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68. West southwest wind 3 to 6 mph.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Light and variable wind becoming southwest 6 to 11 mph in the morning.

    High: 69 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 49. North northwest wind 10 to 18 mph.

    Low: 49 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 52. Breezy, with a north northwest wind 18 to 22 mph.

    High: 52 °F

    Partly Sunny
    and Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 63. West southwest wind around 5 mph.
Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 40. West southwest wind around 5 mph becoming calm in the evening.
Monday
Patchy fog before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming south southwest around 6 mph.
Monday Night
Clear, with a low around 49. Calm wind becoming south southwest around 5 mph after midnight.
Tuesday
Sunny, with a high near 68. West southwest wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 50. Calm wind.
Veterans Day
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Light and variable wind becoming southwest 6 to 11 mph in the morning.
Wednesday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 49. North northwest wind 10 to 18 mph.
Thursday
Partly sunny, with a high near 52. Breezy, with a north northwest wind 18 to 22 mph.
Thursday Night
Partly cloudy, with a low around 37. North northwest wind 11 to 18 mph.
Friday
Sunny, with a high near 46. North northwest wind 9 to 14 mph.
Friday Night
Mostly clear, with a low around 33. North northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 51. Calm wind becoming west northwest 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nason IL
 38.16°N 88.95°W
Last Update:
4:26 pm CST Nov 8, 2026
Forecast Valid:
4pm CST Nov 8, 2026-6pm CST Nov 14, 2026
 
Forecast Discussion
 
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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