S
M
T
W
T
F
S
30
93°
65°
31
94°
71°
1
96°
71°
2
97°
73°
3
98°
74°
4
98°
74°
5
95°
76°
6
87°
67°
7
86°
61°
8
91°
67°
9
94°
75°
10
80°
73°
11
82°
71°
12
88°
72°
13
93°
69°
14
82°
60°
15
96°
64°
16
95°
75°
17
97°
73°
18
91°
69°
19
92°
72°
20
91°
68°
21
83°
65°
22
79°
63°
23
78°
62°
24
80°
60°
25
76°
59°
26
76°
55°
27
81°
60°
28
80°
59°
29
76°
60°
30
77°
53°
1
80°
60°
2
74°
59°
3
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in River Bluff
River Bluff's September 2026 forecast shows daily high temperatures ranging from 74° to 97°, with overnight lows between 53° and 73°. The average high for September is 82° with an average low of 62°. 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 Bluff. See also: October | November | December.