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December 11th, 2025 :: 6:20 pm CST   

Local Weather Report for
Mermentau
Louisiana, United States

 Mermentau Weather Forecast Summary  
 
Today
Dec 11th
Friday
Dec 12th
Saturday
Dec 13th
Sunday
Dec 14th
Monday
Dec 15th
Sunny Cloudy Cloudy Cloudy Cloudy
64°F
74°F
59°F
76°F
66°F
61°F
36°F
51°F
31°F
 
 Mermentau Detailed Weather Forecast  
 
Thursday, December 11th, 2025
Evening Temperature: 54°F
Clear.
Friday, December 12th, 2025
Overnight Temperature: 60°F
Cloudy.
Morning Temperature: 70°F
Cloudy with a slight chance of showers or thundershowers.
Afternoon Temperature: 66°F
Sunny.
Evening Temperature: 65°F
Cloudy.
Saturday, December 13th, 2025
Overnight Temperature: 66°F
Cloudy.
Morning Temperature: 72°F
Cloudy. Windy at times.
Afternoon Temperature: 67°F
A mix of cloud and sun.
Evening Temperature: 67°F
Cloudy. Slight chance of a thunderstorm.
Sunday, December 14th, 2025
Overnight Temperature: 57°F
Cloudy with a chance of showers. Windy.
Morning Temperature: 50°F
Sunny with cloudy periods with a chance of showers. Windy.
Afternoon Temperature: 44°F
Sunny. Windy.
Evening Temperature: 37°F
Clear. Windy at times.
Monday, December 15th, 2025
Overnight Temperature: 32°F
Clear. Windy at times.
Morning Temperature: 44°F
Cloudy.
Afternoon Temperature: 44°F
A mix of cloud and sun.
Evening Temperature: 42°F
Cloudy.
Tuesday, December 16th, 2025
Overnight Temperature: 41°F
Cloudy.
Morning Temperature: 52°F
Cloudy.
Afternoon Temperature: 51°F
Cloudy.
Evening Temperature: 52°F
Cloudy.
Wednesday, December 17th, 2025
Overnight Temperature: 52°F
Cloudy. Windy at times.
Morning Temperature: 64°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 60°F
Sunny.
Evening Temperature: 61°F
Clear. Windy at times.
Thursday, December 18th, 2025
Overnight Temperature: 61°F
Cloudy.
Morning Temperature: 73°F
Sunny with cloudy periods with a slight chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 68°F
Sunny.
Evening Temperature: 66°F
Clear.
Friday, December 19th, 2025
Overnight Temperature: 65°F
Clear with cloudy periods.
Morning Temperature: 74°F
Cloudy. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 69°F
Cloudy.
Evening Temperature: 67°F
A mix of cloudy and clear skies.





 

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This WeatherCity Weather Forecast for Mermentau, Louisiana, 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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