S
M
T
W
T
F
S
30
90°
72°
31
92°
74°
1
92°
74°
2
91°
73°
3
91°
73°
4
90°
74°
5
90°
75°
6
89°
75°
7
89°
74°
8
90°
74°
9
89°
75°
10
90°
74°
11
89°
73°
12
89°
73°
13
88°
72°
14
86°
73°
15
87°
73°
16
85°
72°
17
85°
72°
18
86°
71°
19
88°
72°
20
88°
72°
21
87°
71°
22
87°
72°
23
86°
72°
24
88°
71°
25
88°
70°
26
87°
70°
27
88°
69°
28
86°
69°
29
85°
68°
30
85°
68°
1
86°
69°
2
86°
69°
3
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Johnsons Bayou
Johnsons Bayou's September 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 68° and 75°. The average high for September is 88° with an average low of 72°. 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 Johnsons Bayou. See also: October | November | December.
