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September 12th, 2025 :: 4:56 am CDT   

Local Weather Report for
Collinsville
Illinois, United States

 Current Collinsville Weather Conditions Updated September 12th at 3:53 am 
Temperature:61°F Dew Point:59°F
Barometer:30.12 inHg Wind:calm
Humidity:93.8% Visibility:0M
 
 Collinsville Weather Forecast Summary  
 
Today
Sep 12th
Saturday
Sep 13th
Sunday
Sep 14th
Monday
Sep 15th
Tuesday
Sep 16th
Cloudy Cloudy Cloudy Cloudy Thundershowers
95°F
100°F
70°F
100°F
68°F
99°F
68°F
100°F
70°F
 
 Collinsville Detailed Weather Forecast  
 
Friday, September 12th, 2025
Morning Temperature: 88°F
Sunny.
Afternoon Temperature: 90°F
Cloudy.
Evening Temperature: 74°F
Cloudy. Windy at times.
Saturday, September 13th, 2025
Overnight Temperature: 70°F
A mix of cloudy and clear skies.
Morning Temperature: 92°F
Sunny. Windy at times.
Afternoon Temperature: 93°F
Sunny with cloudy periods. Slight chance of a thunderstorm.
Evening Temperature: 76°F
Cloudy.
Sunday, September 14th, 2025
Overnight Temperature: 68°F
Cloudy with a chance of showers.
Morning Temperature: 89°F
Cloudy with a chance of showers or thundershowers.
Afternoon Temperature: 95°F
Cloudy. Chance of a thunderstorm.
Evening Temperature: 73°F
Cloudy with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Monday, September 15th, 2025
Overnight Temperature: 68°F
Cloudy.
Morning Temperature: 89°F
Cloudy. Chance of a thunderstorm.
Afternoon Temperature: 94°F
Cloudy. Chance of a thunderstorm.
Evening Temperature: 77°F
Cloudy with a slight chance of showers or thundershowers.
Tuesday, September 16th, 2025
Overnight Temperature: 71°F
A mix of cloudy and clear skies with a chance of showers.
Morning Temperature: 91°F
Mostly sunny. Chance of a thunderstorm.
Afternoon Temperature: 92°F
Sunny with cloudy periods with a chance of showers or thundershowers.
Evening Temperature: 70°F
Cloudy with a few showers.
Wednesday, September 17th, 2025
Overnight Temperature: 68°F
Cloudy.
Morning Temperature: 90°F
A mix of cloud and sun. Slight chance of a thunderstorm.
Afternoon Temperature: 93°F
Cloudy. Slight chance of a thunderstorm.
Evening Temperature: 73°F
A mix of cloudy and clear skies with a chance of showers.
Thursday, September 18th, 2025
Overnight Temperature: 69°F
Cloudy with a chance of showers.
Morning Temperature: 86°F
Cloudy. Chance of a thunderstorm.
Afternoon Temperature: 90°F
Cloudy. Chance of a thunderstorm.
Evening Temperature: 68°F
Cloudy with showers likely. Windy at times.
Friday, September 19th, 2025
Overnight Temperature: 67°F
A mix of cloudy and clear skies.
Morning Temperature: 85°F
Sunny. Slight chance of a thunderstorm.
Afternoon Temperature: 85°F
Cloudy with a slight chance of showers or thundershowers. Windy at times.
Evening Temperature: 67°F
A mix of cloudy and clear skies with a few showers.
Saturday, September 20th, 2025
Overnight Temperature: 63°F
Clear.
Morning Temperature: 79°F
Sunny.
Afternoon Temperature: 81°F
Sunny.
Evening Temperature: 68°F
Clear.





 

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This WeatherCity Weather Forecast for Collinsville, 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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