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
89°
75°
12
89°
74°
13
92°
75°
14
93°
75°
15
92°
72°
16
91°
70°
17
93°
71°
18
91°
69°
19
88°
64°
20
87°
64°
21
88°
66°
22
86°
64°
23
87°
66°
24
86°
65°
25
87°
68°
26
84°
67°
27
85°
68°
28
86°
67°
29
86°
67°
30
87°
66°
1
87°
67°
2
85°
66°
3
85°
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 84° to 93°, with overnight lows between 64° and 75°. The average high for September is 88° with an average low of 68°. 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.
