S
M
T
W
T
F
S
30
76°
44°
31
77°
47°
1
78°
49°
2
76°
48°
3
73°
47°
4
68°
48°
5
72°
48°
6
77°
47°
7
77°
47°
8
76°
48°
9
75°
44°
10
72°
40°
11
68°
40°
12
68°
36°
13
67°
38°
14
66°
42°
15
67°
41°
16
72°
43°
17
71°
46°
18
72°
47°
19
64°
46°
20
63°
45°
21
68°
44°
22
73°
44°
23
70°
43°
24
69°
43°
25
72°
42°
26
71°
42°
27
71°
38°
28
66°
40°
29
62°
43°
30
69°
44°
1
70°
45°
2
72°
43°
3
71°
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 62° to 78°, with overnight lows between 36° and 49°. The average high for September is 71° with an average low of 44°. 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.
