S
M
T
W
T
F
S
30
88°
71°
31
90°
71°
1
93°
71°
2
96°
74°
3
93°
75°
4
93°
75°
5
91°
73°
6
82°
72°
7
85°
65°
8
85°
64°
9
86°
68°
10
89°
73°
11
87°
71°
12
86°
71°
13
89°
70°
14
90°
71°
15
88°
70°
16
85°
68°
17
82°
66°
18
83°
67°
19
82°
67°
20
80°
56°
21
85°
68°
22
84°
67°
23
80°
67°
24
80°
66°
25
81°
66°
26
83°
67°
27
84°
66°
28
83°
66°
29
82°
65°
30
82°
65°
1
81°
64°
2
79°
65°
3
81°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in River Bend
River Bend's September 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 56° and 73°. The average high for September is 84° 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 River Bend. See also: October | November | December.