S
M
T
W
T
F
S
30
69°
52°
31
69°
50°
1
68°
53°
2
68°
52°
3
69°
50°
4
67°
54°
5
69°
59°
6
70°
56°
7
76°
49°
8
67°
50°
9
65°
49°
10
64°
51°
11
66°
53°
12
65°
55°
13
71°
55°
14
63°
48°
15
62°
48°
16
Hist. Avg.
65°
51°
17
Hist. Avg.
65°
51°
18
Hist. Avg.
65°
51°
19
Hist. Avg.
64°
50°
20
Hist. Avg.
64°
50°
21
Hist. Avg.
63°
50°
22
Hist. Avg.
63°
50°
23
Hist. Avg.
62°
49°
24
Hist. Avg.
62°
49°
25
Hist. Avg.
62°
48°
26
Hist. Avg.
61°
48°
27
Hist. Avg.
61°
48°
28
Hist. Avg.
60°
47°
29
Hist. Avg.
60°
47°
30
Hist. Avg.
59°
47°
1
Hist. Avg.
59°
46°
2
Hist. Avg.
58°
46°
3
Hist. Avg.
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Copper Harbor
Copper Harbor's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 48° and 59°. The average high for September is 68° with an average low of 52°. 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 Harbor. See also: October | November | December.
