S
M
T
W
T
F
S
30
80°
49°
31
80°
48°
1
79°
49°
2
78°
51°
3
79°
48°
4
79°
47°
5
76°
43°
6
74°
39°
7
67°
42°
8
67°
43°
9
72°
46°
10
75°
46°
11
76°
43°
12
74°
45°
13
74°
45°
14
73°
42°
15
71°
39°
16
65°
43°
17
72°
45°
18
74°
44°
19
76°
45°
20
75°
45°
21
73°
44°
22
65°
40°
23
61°
40°
24
68°
37°
25
68°
36°
26
67°
38°
27
63°
38°
28
61°
37°
29
61°
32°
30
60°
36°
1
59°
42°
2
61°
42°
3
68°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Diamond Peak
Diamond Peak's September 2026 forecast shows daily high temperatures ranging from 59° to 80°, with overnight lows between 32° and 51°. The average high for September is 71° with an average low of 42°. 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 Diamond Peak. See also: October | November | December.
