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.

A Few Clouds

88°F

31°C

Humidity 66%
Wind Speed Calm
Barometer 29.97 in (1014.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 27 Jun 5:56 pm CDT
Extended Forecast for

Sesser IL

Heat Advisory June 27, 06:27pm until June 27, 07:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory June 27, 06:27pm until June 27, 07:00pm

    NOW until 7:00pm Fri

    Heat Advisory

  • Tonight

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 87. South southwest wind 3 to 6 mph. Chance of precipitation is 80%.

    High: 87 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South wind 3 to 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 88. West wind 5 to 7 mph. Chance of precipitation is 80%.

    High: 88 °F

    Showers
    Likely then
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 70. West southwest wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 87. North northwest wind 5 to 7 mph.

    High: 87 °F

    Sunny

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 73. South southwest wind around 6 mph becoming calm in the evening.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Sunday
A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 87. South southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South wind 3 to 6 mph.
Monday
Showers and possibly a thunderstorm. High near 88. West wind 5 to 7 mph. Chance of precipitation is 80%.
Monday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 70. West southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 87. North northwest wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 67. Light north northwest wind.
Wednesday
Sunny, with a high near 89. Light west northwest wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. South wind around 5 mph becoming calm in the evening.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind 5 to 8 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:
5:47 pm CDT Jun 27, 2025
Forecast Valid:
6pm CDT Jun 27, 2025-6pm CDT Jul 4, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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