S
M
T
W
T
F
S
30
96°
74°
31
92°
75°
1
89°
76°
2
95°
74°
3
96°
74°
4
91°
75°
5
92°
74°
6
94°
74°
7
94°
73°
8
95°
72°
9
96°
74°
10
89°
74°
11
92°
74°
12
96°
72°
13
95°
73°
14
95°
74°
15
96°
75°
16
94°
74°
17
94°
67°
18
94°
67°
19
95°
72°
20
92°
69°
21
92°
71°
22
91°
67°
23
89°
66°
24
89°
64°
25
88°
65°
26
87°
65°
27
89°
64°
28
86°
63°
29
86°
67°
30
85°
67°
1
85°
66°
2
86°
67°
3
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Baton Rouge
Baton Rouge's September 2026 forecast shows daily high temperatures ranging from 85° to 96°, with overnight lows between 63° and 75°. The average high for September is 90° with an average low of 67°. 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 Baton Rouge. See also: October | November | December.
