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

44°F

7°C

Humidity 89%
Wind Speed Calm
Barometer 29.89 in (1012.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 12 Nov 2:56 am CST
Extended Forecast for

Sesser IL

  • Overnight

    Overnight: Mostly clear, with a low around 42. Calm wind becoming north northwest around 6 mph.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of sprinkles between 11am and 1pm, then a slight chance of showers after 1pm. Partly sunny, with a high near 54. Breezy, with a northwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 54 °F

    Partly Sunny
    then Slight
    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A chance of sprinkles before 7pm. Partly cloudy, with a low around 32. North northwest wind 8 to 15 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Chance
    Sprinkles

  • Friday

    Friday: Mostly sunny, with a high near 47. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. North northwest wind 3 to 8 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 49. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52. Light and variable wind.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 42. Calm wind becoming north northwest around 6 mph.
Thursday
A chance of sprinkles between 11am and 1pm, then a slight chance of showers after 1pm. Partly sunny, with a high near 54. Breezy, with a northwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Thursday Night
A chance of sprinkles before 7pm. Partly cloudy, with a low around 32. North northwest wind 8 to 15 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 47. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 27. North northwest wind 3 to 8 mph.
Saturday
Sunny, with a high near 49. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Mostly clear, with a low around 27. Calm wind.
Sunday
Sunny, with a high near 52. Light and variable wind.
Sunday Night
Mostly clear, with a low around 29. Calm wind.
Monday
Sunny, with a high near 53. Light east wind.
Monday Night
Mostly clear, with a low around 29. Calm wind.
Tuesday
Sunny, with a high near 55. Calm wind becoming east around 5 mph.
Tuesday Night
Clear, with a low around 29. Calm wind.
Wednesday
Sunny, with a high near 60. Calm wind becoming south southeast around 6 mph.
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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:
3:41 am CST Nov 12, 2026
Forecast Valid:
3am CST Nov 12, 2026-6pm CST Nov 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