S
M
T
W
T
F
S
30
92°
73°
31
89°
73°
1
90°
72°
2
92°
74°
3
93°
74°
4
93°
73°
5
89°
73°
6
90°
72°
7
90°
72°
8
89°
71°
9
91°
72°
10
92°
72°
11
92°
71°
12
91°
72°
13
89°
72°
14
89°
69°
15
89°
68°
16
91°
71°
17
92°
70°
18
91°
66°
19
88°
67°
20
85°
65°
21
85°
65°
22
86°
67°
23
88°
66°
24
89°
64°
25
89°
66°
26
88°
66°
27
83°
65°
28
82°
63°
29
87°
64°
30
86°
64°
1
87°
63°
2
87°
62°
3
86°
62°
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 82° to 93°, with overnight lows between 62° and 74°. The average high for September is 89° with an average low of 69°. 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.
