S
M
T
W
T
F
S
26
53°
37°
27
62°
42°
28
58°
40°
29
47°
36°
30
41°
33°
1
40°
30°
2
50°
28°
3
67°
38°
4
71°
43°
5
53°
34°
6
46°
34°
7
48°
34°
8
62°
34°
9
59°
40°
10
50°
35°
11
47°
33°
12
57°
35°
13
55°
39°
14
62°
43°
15
62°
45°
16
82°
47°
17
49°
43°
18
74°
44°
19
71°
43°
20
55°
38°
21
53°
33°
22
60°
44°
23
58°
45°
24
67°
45°
25
80°
49°
26
85°
53°
27
66°
46°
28
61°
48°
29
71°
50°
30
60°
47°
31
66°
50°
1
67°
50°
2
73°
55°
3
74°
54°
4
72°
56°
5
74°
55°
6
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sister Bay
Sister Bay's May 2026 forecast shows daily high temperatures ranging from 60° to 74°, with overnight lows between 46° and 56°. The average high for May is 69° with an average low of 51°. 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 Sister Bay. See also: June | July | August.
