National Weather Service Forecast for: Napoleonville LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 10:41 pm CDT Sep 20, 2026
 
Tonight

Tonight: Mostly clear, with a low around 75. Calm wind.
Mostly Clear

 Monday

Monday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming north around 5 mph.
Mostly Sunny
then Chance
T-storms
 Monday
Night
Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, then gradually becoming clear, with a low around 75. Calm wind. Chance of precipitation is 20%.
Slight Chance
T-storms then
Mostly Clear
 Tuesday

Tuesday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Sunny then
Slight Chance
T-storms
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 75. Calm wind.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 94. Calm wind becoming northeast around 5 mph in the afternoon.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 74. Calm wind.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 93. Northeast wind around 5 mph.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 71. Calm wind becoming northeast around 5 mph.
Mostly Clear
Lo 75 °F Hi 94 °F Lo 75 °F Hi 95 °F Lo 75 °F Hi 94 °F Lo 74 °F Hi 93 °F Lo 71 °F

 

Tonight
 
 Mostly clear, with a low around 75. Calm wind.
Monday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming north around 5 mph.
Monday Night
 
 A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, then gradually becoming clear, with a low around 75. Calm wind. Chance of precipitation is 20%.
Tuesday
 
 A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
 
 Mostly clear, with a low around 75. Calm wind.
Wednesday
 
 Sunny, with a high near 94. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 74. Calm wind.
Thursday
 
 Sunny, with a high near 93. Northeast wind around 5 mph.
Thursday Night
 
 Mostly clear, with a low around 71. Calm wind becoming northeast around 5 mph.
Friday
 
 Mostly sunny, with a high near 91. Northeast wind around 5 mph.
Friday Night
 
 Partly cloudy, with a low around 70. Calm wind.
Saturday
 
 Mostly sunny, with a high near 90. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
 
 Partly cloudy, with a low around 70. Calm wind.
Sunday
 
 Mostly sunny, with a high near 90. Calm wind becoming northeast around 5 mph in the afternoon.

 

Forecast from NOAA-NWS for Napoleonville LA.