S
M
T
W
T
F
S
30
74°
47°
31
67°
44°
1
64°
47°
2
64°
44°
3
63°
45°
4
65°
44°
5
63°
45°
6
65°
48°
7
67°
51°
8
64°
48°
9
65°
47°
10
65°
47°
11
63°
50°
12
66°
51°
13
65°
49°
14
69°
48°
15
65°
45°
16
64°
42°
17
62°
48°
18
66°
49°
19
60°
43°
20
69°
48°
21
68°
48°
22
Hist. Avg.
60°
43°
23
Hist. Avg.
60°
42°
24
Hist. Avg.
59°
42°
25
Hist. Avg.
59°
42°
26
Hist. Avg.
58°
41°
27
Hist. Avg.
58°
41°
28
Hist. Avg.
58°
41°
29
Hist. Avg.
57°
40°
30
Hist. Avg.
57°
40°
1
Hist. Avg.
56°
40°
2
Hist. Avg.
56°
39°
3
Hist. Avg.
55°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Copper Cliff
Copper Cliff's September 2026 forecast shows daily high temperatures ranging from 60° to 74°, with overnight lows between 42° and 51°. The average high for September is 65° with an average low of 47°. 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 Copper Cliff. See also: October | November | December.
