S
M
T
W
T
F
S
30
85°
64°
31
88°
63°
1
88°
64°
2
90°
65°
3
90°
66°
4
90°
67°
5
90°
68°
6
90°
66°
7
76°
67°
8
82°
66°
9
85°
58°
10
87°
58°
11
89°
62°
12
79°
65°
13
84°
64°
14
88°
64°
15
85°
63°
16
86°
60°
17
85°
59°
18
85°
60°
19
85°
60°
20
83°
61°
21
82°
59°
22
80°
58°
23
76°
55°
24
76°
56°
25
75°
55°
26
77°
54°
27
79°
53°
28
79°
54°
29
79°
54°
30
78°
53°
1
78°
53°
2
77°
54°
3
79°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mineral Bluff
Mineral Bluff's September 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 53° and 64°. The average high for September is 81° with an average low of 57°. 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 Mineral Bluff. See also: October | November | December.