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.

78°F

26°C

Humidity 67%
Wind Speed SW 17 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 10 Mar 3:56 pm CDT
Extended Forecast for

Nason IL

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 76. South southwest wind around 15 mph, with gusts as high as 23 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 61. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    Low: 61 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms before 3pm, then a chance of showers. Temperature rising to near 69 by 11am, then falling to around 53 during the remainder of the day. Breezy, with a southwest wind 16 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 69 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 30 mph.

    Low: 32 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind 5 to 7 mph becoming southwest in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 28 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 63. Southwest wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 63 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. North northwest wind around 6 mph becoming east after midnight.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. East wind 7 to 11 mph becoming south in the afternoon.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 76. South southwest wind around 15 mph, with gusts as high as 23 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 61. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Wednesday
Showers and thunderstorms before 3pm, then a chance of showers. Temperature rising to near 69 by 11am, then falling to around 53 during the remainder of the day. Breezy, with a southwest wind 16 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 54. North northwest wind 5 to 7 mph becoming southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 41. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 28 mph.
Friday
Partly sunny, with a high near 63. Southwest wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.
Friday Night
Partly cloudy, with a low around 38. North northwest wind around 6 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 67. East wind 7 to 11 mph becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 53. South southeast wind 9 to 15 mph, with gusts as high as 24 mph.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 67. Breezy, with a south wind 16 to 21 mph becoming west in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 23. Blustery, with a northwest wind 17 to 21 mph, with gusts as high as 30 mph.
Monday
Mostly sunny, with a high near 37. Northwest wind 13 to 15 mph, with gusts as high as 23 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:
2:06 pm CDT Mar 10, 2026
Forecast Valid:
4pm CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
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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