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June 17th, 2026 :: 9:09 pm CDT   

Local Weather Report for
Mount Vernon
Illinois, United States

 Mount Vernon Weather Forecast Summary  
 
Today
Jun 17th
Thursday
Jun 18th
Friday
Jun 19th
Saturday
Jun 20th
Sunday
Jun 21st
Thundershowers Mostly Cloudy with Showers Mostly Sunny Mostly Sunny Mostly Cloudy with Showers
86°F
75°F
63°F
78°F
60°F
81°F
64°F
74°F
60°F
 
 Mount Vernon Detailed Weather Forecast  
 
Wednesday, June 17th, 2026
Evening Temperature: 79°F
Clear with cloudy periods with showers likely. Chance of a thunderstorm. Wind 20 to 30 mph.
Thursday, June 18th, 2026
Overnight Temperature: 69°F
Clear with showers likely. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 69°F
Mostly sunny. Windy at times.
Afternoon Temperature: 72°F
A mix of cloud and sun with a slight chance of showers. Windy at times.
Evening Temperature: 65°F
Mostly clear.
Friday, June 19th, 2026
Overnight Temperature: 60°F
Mostly clear.
Morning Temperature: 67°F
Mostly sunny.
Afternoon Temperature: 77°F
Mostly sunny.
Evening Temperature: 71°F
Mostly clear.
Saturday, June 20th, 2026
Overnight Temperature: 65°F
Clear with cloudy periods.
Morning Temperature: 68°F
A mix of cloud and sun.
Afternoon Temperature: 80°F
Sunny.
Evening Temperature: 73°F
Clear.
Sunday, June 21st, 2026
Overnight Temperature: 68°F
Cloudy with a slight chance of showers. Windy at times.
Morning Temperature: 69°F
Mostly cloudy with showers. Slight chance of a thunderstorm. Windy.
Afternoon Temperature: 70°F
Sunny with cloudy periods with a few showers. Slight chance of a thunderstorm. Windy.
Evening Temperature: 62°F
Clear with cloudy periods with a slight chance of showers. Windy.
Monday, June 22nd, 2026
Overnight Temperature: 54°F
Mostly clear.
Morning Temperature: 59°F
Mostly sunny.
Afternoon Temperature: 72°F
Mostly sunny.
Evening Temperature: 65°F
Mostly clear.
Tuesday, June 23rd, 2026
Overnight Temperature: 57°F
Clear.
Morning Temperature: 64°F
Mostly sunny.
Afternoon Temperature: 75°F
Mostly sunny.
Evening Temperature: 69°F
Mostly clear.
Wednesday, June 24th, 2026
Overnight Temperature: 64°F
A mix of clear and cloudy skies.
Morning Temperature: 68°F
Sunny with cloudy periods.
Afternoon Temperature: 79°F
Mostly sunny.
Evening Temperature: 73°F
Clear with cloudy periods.
Thursday, June 25th, 2026
Overnight Temperature: 64°F
Clear.
Morning Temperature: 70°F
Sunny. Windy at times.
Afternoon Temperature: 80°F
A mix of sun and cloud. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 75°F
Clear. Chance of a thunderstorm. Windy at times.





 

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This WeatherCity Weather Forecast for Mount Vernon, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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