S
M
T
W
T
F
S
26
50°
34°
27
58°
35°
28
47°
39°
29
39°
33°
30
39°
33°
1
40°
34°
2
47°
31°
3
59°
39°
4
56°
38°
5
39°
35°
6
40°
35°
7
42°
32°
8
56°
30°
9
47°
36°
10
41°
34°
11
44°
35°
12
43°
36°
13
53°
37°
14
61°
35°
15
80°
46°
16
69°
42°
17
48°
36°
18
62°
39°
19
49°
37°
20
42°
33°
21
53°
32°
22
59°
39°
23
58°
42°
24
60°
43°
25
73°
42°
26
69°
47°
27
57°
44°
28
62°
47°
29
68°
47°
30
59°
48°
31
65°
46°
1
60°
47°
2
64°
52°
3
73°
56°
4
72°
48°
5
58°
46°
6
63°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Copper Harbor
Copper Harbor's May 2026 forecast shows daily high temperatures ranging from 58° to 73°, with overnight lows between 46° and 56°. The average high for May is 64° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Copper Harbor. See also: June | July | August.
