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 and Breezy

81°F

27°C

Humidity 41%
Wind Speed S 23 G 30 mph
Barometer 29.86 in (1011.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 31 Mar 4:56 pm CDT
Extended Forecast for

2 Miles W Nason IL

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 63. South southwest wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. South southwest wind 6 to 9 mph. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 16 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.

    High: 79 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 63. South southwest wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. South wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South southwest wind around 16 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind around 14 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 63. South southwest wind 7 to 14 mph, with gusts as high as 24 mph.
Wednesday
Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. South southwest wind 6 to 9 mph. Chance of precipitation is 70%.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 16 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Low around 63. South southwest wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. South wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South southwest wind around 16 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind around 14 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 55. Northwest wind around 15 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 34. North wind 5 to 10 mph.
Monday
Sunny, with a high near 62. East northeast wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 40. Southeast wind around 6 mph becoming south southwest after midnight.
Tuesday
Sunny, with a high near 68. South southwest wind 7 to 9 mph becoming northwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Nason IL
 38.18°N 89.01°W
Last Update:
2:01 pm CDT Mar 31, 2026
Forecast Valid:
5pm CDT Mar 31, 2026-6pm CDT Apr 7, 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