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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

60°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 30.16 in (1021.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 24 Jun 6:56 am CDT
Extended Forecast for

Nason IL

  • Today

    Today: Mostly sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 85. Light southwest wind.

    High: 85 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 72. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 90%.

    Low: 72 °F

    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 83. South southwest wind 7 to 9 mph. Chance of precipitation is 80%.

    High: 83 °F

    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 73. South southwest wind 3 to 7 mph. Chance of precipitation is 70%.

    Low: 73 °F

    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. South southwest wind 3 to 6 mph. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75. South wind 3 to 5 mph.

    Low: 75 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 90. South southwest wind 6 to 9 mph.

    High: 90 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 85. Light southwest wind.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 72. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 90%.
Friday
Showers and possibly a thunderstorm. High near 83. South southwest wind 7 to 9 mph. Chance of precipitation is 80%.
Friday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 73. South southwest wind 3 to 7 mph. Chance of precipitation is 70%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. South southwest wind 3 to 6 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 90. South southwest wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 77. South wind 6 to 9 mph.
Monday
Sunny, with a high near 92. South southwest wind 6 to 8 mph.
Monday Night
Clear, with a low around 78. South wind 5 to 9 mph.
Tuesday
Sunny, with a high near 93. South southwest wind around 6 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:
6:06 am CDT Jun 24, 2026
Forecast Valid:
7am CDT Jun 24, 2026-6pm CDT Jun 30, 2026
 
Forecast Discussion
 
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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