National Weather Service Forecast for: Port Allen LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 9:51 pm CST Feb 1, 2026
 
Tonight

Tonight: Widespread frost after midnight. Otherwise, clear, with a low around 31. Calm wind.
Clear then
Frost

 Monday

Monday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 63. Calm wind becoming southwest around 5 mph in the afternoon.
Frost then
Sunny

 Monday
Night
Monday Night: Increasing clouds, with a low around 45. South wind around 5 mph.
Increasing
Clouds

 Tuesday

Tuesday: A 20 percent chance of showers after noon. Partly sunny, with a high near 69. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Mostly Sunny
then Slight
Chance
Showers
 Tuesday
Night
Tuesday Night: Showers before 9pm, then showers and possibly a thunderstorm between 9pm and 3am, then showers after 3am. Low around 48. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 80%.
Showers

 Wednesday

Wednesday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 58. North wind 5 to 10 mph, with gusts as high as 20 mph.
Slight Chance
Showers then
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 35. North wind 5 to 10 mph.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 54. Northwest wind 5 to 10 mph.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 38. Northwest wind around 5 mph becoming calm.
Mostly Clear
Lo 31 °F Hi 63 °F Lo 45 °F Hi 69 °F Lo 48 °F Hi 58 °F Lo 35 °F Hi 54 °F Lo 38 °F

 

Tonight
 
 Widespread frost after midnight. Otherwise, clear, with a low around 31. Calm wind.
Monday
 
 Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 63. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
 Increasing clouds, with a low around 45. South wind around 5 mph.
Tuesday
 
 A 20 percent chance of showers after noon. Partly sunny, with a high near 69. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Showers before 9pm, then showers and possibly a thunderstorm between 9pm and 3am, then showers after 3am. Low around 48. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 80%.
Wednesday
 
 A 20 percent chance of showers before noon. Mostly sunny, with a high near 58. North wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
 
 Mostly clear, with a low around 35. North wind 5 to 10 mph.
Thursday
 
 Sunny, with a high near 54. Northwest wind 5 to 10 mph.
Thursday Night
 
 Mostly clear, with a low around 38. Northwest wind around 5 mph becoming calm.
Friday
 
 Sunny, with a high near 66. Light southwest wind becoming west 5 to 10 mph in the morning.
Friday Night
 
 Mostly clear, with a low around 42. West wind around 5 mph becoming calm in the evening.
Saturday
 
 Sunny, with a high near 66. Calm wind becoming northeast around 5 mph.
Saturday Night
 
 Mostly clear, with a low around 42. Calm wind becoming east around 5 mph.
Sunday
 
 Sunny, with a high near 69. Calm wind becoming south around 5 mph in the morning.

 

Forecast from NOAA-NWS for Port Allen LA.