Thunderstorms and Heavy Rainfall from the Plains to the Mid-Atlantic

Severe thunderstorms producing damaging winds are most likely over parts of the Dakotas into Minnesota from this afternoon into the overnight, with other isolated storms producing hail or wind over the northern High Plains. In the Northern Plains into the Upper Great Lakes and Mid-Atlantic, heavy to excessive rain may bring flash and urban flooding through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

A Few Clouds

85°F

29°C

Humidity 68%
Wind Speed NE 7 mph
Barometer 30.06 in (1017.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 7 Jul 12:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 86. North northeast wind 3 to 5 mph.

    High: 86 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Partly cloudy, with a low around 74. South wind around 6 mph.  Chance of precipitation is 70%.

    Low: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 90. Southwest wind 5 to 8 mph.  Chance of precipitation is 70%.

    High: 90 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm.  Mostly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm  in the evening.

    Low: 72 °F

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms.  Partly sunny, with a high near 88. Light southwest wind.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. North northeast wind 3 to 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 88. Calm wind.
Wednesday Night
Mostly clear, with a low around 70. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 74. South wind around 6 mph. Chance of precipitation is 70%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 90. Southwest wind 5 to 8 mph. Chance of precipitation is 70%.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Light southwest wind.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 90. Calm wind becoming east northeast around 5 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
1:26 pm CDT Jul 7, 2026
1pm CDT Jul 7, 2026-6pm CDT Jul 13, 2026
 
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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