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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Partly Cloudy

82°F

28°C

Humidity 55%
Wind Speed N 5 mph
Barometer 29.93 in (1013.7 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 20 Jun 6:56 pm CDT
Extended Forecast for

Du Bois IL

Flood Watch June 21, 07:00am until June 22, 07:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Light and variable wind.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly between noon and 3pm. Increasing clouds, with a high near 87. Breezy, with a southeast wind 5 to 10 mph becoming south 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    High: 87 °F

    T-storms
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 2am. Some of the storms could produce heavy rainfall. Low around 68. Southwest wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    Low: 68 °F

    Heavy Rain

  • Monday

    Monday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 79. West wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 66. Light and variable wind.
Sunday
Showers and thunderstorms likely, mainly between noon and 3pm. Increasing clouds, with a high near 87. Breezy, with a southeast wind 5 to 10 mph becoming south 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms, mainly before 2am. Some of the storms could produce heavy rainfall. Low around 68. Southwest wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Monday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 79. West wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Du Bois IL
 38.21°N 89.2°W (Elev. 499 ft)
Last Update:
6:41 pm CDT Jun 20, 2026
Forecast Valid:
7pm CDT Jun 20, 2026-6pm CDT Jun 27, 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