National Weather Service Forecast for: Zachary LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 1:25 am CDT Jun 30, 2026
 
Overnight

Overnight: Clear, with a low around 75. Calm wind.
Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind.
Hot

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 77. Calm wind.
Partly Cloudy

 Wednesday

Wednesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Northwest wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 70%.
Mostly Sunny
then T-storms
Likely
 Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 76. East wind around 5 mph becoming calm. Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
 Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the afternoon.
Sunny then
Slight Chance
T-storms
 Thursday
Night
Thursday Night: Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm.
Mostly Clear

 Friday

Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming south around 5 mph.
Sunny then
Slight Chance
T-storms
 Friday
Night
Friday Night: Mostly clear, with a low around 76. Calm wind.
Mostly Clear
Lo 75 °F Hi 96 °F Lo 77 °F Hi 94 °F Lo 76 °F Hi 94 °F Lo 75 °F Hi 94 °F Lo 76 °F

Heat Advisory
 

Overnight
 
 Clear, with a low around 75. Calm wind.
Tuesday
 
 Sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind.
Tuesday Night
 
 Partly cloudy, with a low around 77. Calm wind.
Wednesday
 
 Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Northwest wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 70%.
Wednesday Night
 
 A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 76. East wind around 5 mph becoming calm. Chance of precipitation is 20%.
Thursday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm.
Friday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming south around 5 mph.
Friday Night
 
 Mostly clear, with a low around 76. Calm wind.
Independence Day
 
 A chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 94. Calm wind becoming west around 5 mph.
Saturday Night
 
 A slight chance of showers and thunderstorms. Mostly clear, with a low around 76. South wind around 5 mph becoming calm.
Sunday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 76. Southwest wind around 5 mph becoming calm in the evening.
Monday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

 

Forecast from NOAA-NWS for Zachary LA.