S
M
T
W
T
F
S
30
78°
42°
31
79°
43°
1
85°
47°
2
87°
51°
3
88°
48°
4
88°
47°
5
75°
40°
6
76°
46°
7
80°
43°
8
79°
45°
9
80°
44°
10
78°
40°
11
76°
42°
12
77°
44°
13
76°
44°
14
75°
38°
15
72°
37°
16
71°
35°
17
71°
36°
18
72°
37°
19
72°
41°
20
76°
40°
21
80°
39°
22
75°
37°
23
70°
37°
24
68°
36°
25
66°
36°
26
67°
35°
27
67°
34°
28
66°
39°
29
72°
38°
30
66°
33°
1
78°
46°
2
78°
42°
3
Hist. Avg.
65°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Riverbend
Riverbend's September 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 33° and 51°. The average high for September is 75° with an average low of 41°. 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 Riverbend. See also: October | November | December.