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September 18th, 2025 :: 4:19 pm CDT   

Local Weather Report for
Mount Vernon
Illinois, United States

 Current Mount Vernon Weather Conditions Updated September 18th at 2:56 pm 
Temperature:91°F Dew Point:55°F
Barometer:30.01 inHg Wind:N 13 Mph
Humidity:29.8% Visibility:0M
 
 Mount Vernon Weather Forecast Summary  
 
Today
Sep 18th
Friday
Sep 19th
Saturday
Sep 20th
Sunday
Sep 21st
Monday
Sep 22nd
Mix of Cloud and Sun Cloudy Cloudy Cloudy Thundershowers
96°F
93°F
64°F
92°F
66°F
96°F
67°F
90°F
66°F
 
 Mount Vernon Detailed Weather Forecast  
 
Thursday, September 18th, 2025
Evening Temperature: 72°F
A mix of cloudy and clear skies.
Friday, September 19th, 2025
Overnight Temperature: 65°F
A mix of cloudy and clear skies.
Morning Temperature: 87°F
Cloudy.
Afternoon Temperature: 86°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 71°F
Cloudy with a chance of showers.
Saturday, September 20th, 2025
Overnight Temperature: 67°F
Clear with a chance of showers.
Morning Temperature: 84°F
A mix of cloud and sun. Slight chance of a thunderstorm.
Afternoon Temperature: 87°F
Cloudy.
Evening Temperature: 73°F
Cloudy.
Sunday, September 21st, 2025
Overnight Temperature: 67°F
A mix of cloudy and clear skies.
Morning Temperature: 82°F
Cloudy. Windy at times.
Afternoon Temperature: 85°F
A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 69°F
Cloudy with a chance of showers.
Monday, September 22nd, 2025
Overnight Temperature: 68°F
A mix of cloudy and clear skies with a chance of showers. Windy at times.
Morning Temperature: 82°F
A mix of cloud and sun with a few showers. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 80°F
Cloudy with showers likely. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 67°F
Cloudy with showers likely. Windy at times.
Tuesday, September 23rd, 2025
Overnight Temperature: 68°F
Cloudy with a chance of showers. Windy at times.
Morning Temperature: 80°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 82°F
Cloudy. Slight chance of a thunderstorm. Windy.
Evening Temperature: 68°F
Cloudy with showers likely.
Wednesday, September 24th, 2025
Overnight Temperature: 67°F
Cloudy with a few showers. Slight chance of a thunderstorm.
Morning Temperature: 67°F
Cloudy with showers likely. Chance of a thunderstorm.
Afternoon Temperature: 67°F
A mix of cloud and sun with a chance of showers.
Evening Temperature: 62°F
Cloudy with a chance of showers.
Thursday, September 25th, 2025
Overnight Temperature: 57°F
A mix of cloudy and clear skies with a slight chance of showers.
Morning Temperature: 69°F
Sunny. Windy at times.
Afternoon Temperature: 75°F
Cloudy. Windy at times.
Evening Temperature: 65°F
A mix of cloudy and clear skies.
Friday, September 26th, 2025
Overnight Temperature: 60°F
Clear with cloudy periods.
Morning Temperature: 72°F
Cloudy.
Afternoon Temperature: 74°F
Cloudy.
Evening Temperature: 65°F
Cloudy.





 

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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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