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

27°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 30.23 in (1024.6 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 7 Nov 5:56 am CST
Extended Forecast for

4 Miles SW Nason IL

Freeze Warning November 7, 11:00pm until November 8, 08:00am
Freeze Warning November 7, 06:28am until November 7, 08:00am
Click here for hazard details and duration
Freeze Warning
...
  •  
    Freeze Warning November 7, 06:28am until November 7, 08:00am

    NOW until 8:00am Sat

    Freeze Warning

  • Today

    High: 55 °F

    Frost then
    Mostly Sunny

  • Tonight

    Tonight: Areas of frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Clear
    then Areas
    Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. Calm wind becoming west southwest 5 to 8 mph in the morning.

    High: 63 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. West wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Calm wind becoming southwest around 5 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 46. Calm wind becoming south southwest around 5 mph.

    Low: 46 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 70. West wind around 6 mph becoming calm in the afternoon.

    High: 70 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Today
Widespread frost, mainly before 7am. Otherwise, mostly sunny, with a high near 55. Light northwest wind.
Tonight
Areas of frost after 1am. Otherwise, mostly clear, with a low around 34. Calm wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. Calm wind becoming west southwest 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 41. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 67. Calm wind becoming southwest around 5 mph.
Monday Night
Clear, with a low around 46. Calm wind becoming south southwest around 5 mph.
Tuesday
Sunny, with a high near 70. West wind around 6 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 47. Calm wind.
Veterans Day
Mostly sunny, with a high near 66. Calm wind becoming west northwest around 6 mph in the afternoon.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 45. Light north northwest wind increasing to 5 to 9 mph in the evening.
Thursday
Mostly sunny, with a high near 57. North wind 9 to 15 mph.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 38. North wind 7 to 10 mph.
Friday
Mostly sunny, with a high near 51. North wind 7 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Nason IL
 38.14°N 89.01°W
Last Update:
4:41 am CST Nov 7, 2026
Forecast Valid:
6am CST Nov 7, 2026-6pm CST Nov 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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