S
M
T
W
T
F
S
30
95°
66°
31
92°
65°
1
91°
64°
2
95°
65°
3
96°
66°
4
94°
65°
5
93°
65°
6
89°
63°
7
95°
65°
8
96°
65°
9
97°
66°
10
97°
66°
11
96°
65°
12
96°
65°
13
93°
63°
14
87°
57°
15
88°
60°
16
88°
63°
17
94°
64°
18
96°
63°
19
95°
62°
20
94°
63°
21
94°
63°
22
92°
62°
23
87°
58°
24
86°
59°
25
91°
61°
26
92°
59°
27
92°
59°
28
88°
60°
29
85°
57°
30
90°
57°
1
83°
51°
2
81°
49°
3
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Red Bluff
Red Bluff's September 2026 forecast shows daily high temperatures ranging from 81° to 97°, with overnight lows between 49° and 66°. The average high for September is 91° with an average low of 61°. 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 Red Bluff. See also: October | November | December.
