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

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1016.2 mb)
Dewpoint 54°F (12°C)
Visibility 9.00 mi
Last update 12 Oct 4:56 am CDT
Extended Forecast for

Sesser IL

  • Columbus Day

    Columbus Day: Sunny, with a high near 91. Southwest wind 5 to 15 mph, with gusts as high as 18 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Southwest wind around 9 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Southwest wind 7 to 13 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly clear, with a low around 71. South southwest wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 71 °F

    Clear then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 86. West wind around 7 mph. Chance of precipitation is 80%.

    High: 86 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Light and variable wind becoming west southwest 9 to 14 mph in the morning. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. West northwest wind 9 to 17 mph, with gusts as high as 22 mph.

    Low: 56 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 66. Breezy, with a north northwest wind 20 to 24 mph, with gusts as high as 32 mph.

    High: 66 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Columbus Day
Sunny, with a high near 91. Southwest wind 5 to 15 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 66. Southwest wind around 9 mph.
Tuesday
Sunny, with a high near 93. Southwest wind 7 to 13 mph.
Tuesday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly clear, with a low around 71. South southwest wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday
Showers and possibly a thunderstorm. High near 86. West wind around 7 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Light and variable wind becoming west southwest 9 to 14 mph in the morning. Chance of precipitation is 70%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. West northwest wind 9 to 17 mph, with gusts as high as 22 mph.
Friday
Mostly sunny, with a high near 66. Breezy, with a north northwest wind 20 to 24 mph, with gusts as high as 32 mph.
Friday Night
Mostly clear, with a low around 41. Breezy, with a north wind 15 to 20 mph decreasing to 9 to 14 mph after midnight.
Saturday
Sunny, with a high near 62. Northeast wind around 9 mph.
Saturday Night
Clear, with a low around 38. Calm wind.
Sunday
Sunny, with a high near 70. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sesser IL
 38.09°N 89.04°W
Last Update:
5:06 am CDT Oct 12, 2026
Forecast Valid:
5am CDT Oct 12, 2026-6pm CDT Oct 18, 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