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September 17th, 2025 :: 10:25 pm CDT   

Local Weather Report for
Merrillville
Indiana, United States

 Current Merrillville Weather Conditions Updated September 17th at 8:50 pm 
Temperature:68°F Dew Point:68°F
Barometer:30.04 inHg Wind:calm
Humidity:100.0% Visibility:0M
 
 Merrillville Weather Forecast Summary  
 
Today
Sep 17th
Thursday
Sep 18th
Friday
Sep 19th
Saturday
Sep 20th
Sunday
Sep 21st
Sunny Mix of Cloud and Sun Cloudy Cloudy Cloudy
84°F
88°F
61°F
90°F
62°F
86°F
60°F
87°F
63°F
 
 Merrillville Detailed Weather Forecast  
 
Thursday, September 18th, 2025
Overnight Temperature: 61°F
Clear.
Morning Temperature: 83°F
A mix of cloud and sun.
Afternoon Temperature: 78°F
Mostly sunny.
Evening Temperature: 64°F
Clear.
Friday, September 19th, 2025
Overnight Temperature: 62°F
Clear with cloudy periods.
Morning Temperature: 84°F
Cloudy.
Afternoon Temperature: 81°F
A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 70°F
Clear with cloudy periods.
Saturday, September 20th, 2025
Overnight Temperature: 61°F
A mix of cloudy and clear skies.
Morning Temperature: 79°F
Cloudy. Windy at times.
Afternoon Temperature: 78°F
Cloudy. Slight chance of a thunderstorm.
Evening Temperature: 65°F
Cloudy.
Sunday, September 21st, 2025
Overnight Temperature: 63°F
A mix of cloudy and clear skies.
Morning Temperature: 83°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 81°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 68°F
Cloudy.
Monday, September 22nd, 2025
Overnight Temperature: 63°F
Clear.
Morning Temperature: 84°F
A mix of cloud and sun. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 85°F
Cloudy. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 67°F
Cloudy with a slight chance of showers. Windy at times.
Tuesday, September 23rd, 2025
Overnight Temperature: 66°F
Cloudy with a chance of showers. Windy at times.
Morning Temperature: 73°F
A mix of cloud and sun with a chance of showers. Windy at times.
Afternoon Temperature: 68°F
Cloudy. Windy at times.
Evening Temperature: 57°F
Clear.
Wednesday, September 24th, 2025
Overnight Temperature: 55°F
Clear. Windy at times.
Morning Temperature: 76°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 72°F
Sunny. Windy.
Evening Temperature: 57°F
Cloudy.
Thursday, September 25th, 2025
Overnight Temperature: 60°F
Clear.
Morning Temperature: 74°F
Sunny. Windy at times.
Afternoon Temperature: 66°F
Sunny. Windy at times.
Evening Temperature: 57°F
Clear.





 

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This WeatherCity Weather Forecast for Merrillville, Indiana, 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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