S
M
T
W
T
F
S
30
94°
56°
31
86°
56°
1
71°
57°
2
73°
59°
3
69°
58°
4
77°
54°
5
82°
56°
6
83°
52°
7
90°
59°
8
95°
55°
9
103°
64°
10
100°
72°
11
93°
58°
12
90°
59°
13
83°
54°
14
90°
65°
15
88°
53°
16
79°
58°
17
77°
54°
18
91°
53°
19
95°
59°
20
93°
61°
21
91°
57°
22
90°
59°
23
94°
60°
24
96°
61°
25
92°
62°
26
88°
59°
27
88°
58°
28
87°
57°
29
86°
57°
30
87°
56°
1
86°
57°
2
85°
54°
3
89°
59°
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 85° to 96°, with overnight lows between 54° and 62°. The average high for September is 89° with an average low of 58°. 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.
