S
M
T
W
T
F
S
30
94°
70°
31
100°
72°
1
100°
73°
2
100°
76°
3
99°
77°
4
99°
76°
5
100°
73°
6
89°
70°
7
89°
64°
8
97°
64°
9
84°
70°
10
78°
67°
11
81°
66°
12
87°
65°
13
84°
66°
14
87°
72°
15
89°
66°
16
80°
66°
17
76°
61°
18
75°
57°
19
74°
53°
20
71°
54°
21
75°
54°
22
77°
58°
23
78°
56°
24
76°
52°
25
81°
59°
26
81°
58°
27
80°
59°
28
80°
59°
29
78°
58°
30
78°
55°
1
77°
50°
2
77°
56°
3
78°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Louisiana
Louisiana's September 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 50° and 72°. The average high for September is 79° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Louisiana. See also: October | November | December.
