S
M
T
W
T
F
S
26
84°
63°
27
85°
54°
28
83°
59°
29
81°
55°
30
82°
57°
31
77°
61°
1
84°
62°
2
83°
55°
3
81°
54°
4
80°
52°
5
75°
56°
6
76°
55°
7
76°
61°
8
81°
62°
9
84°
58°
10
83°
62°
11
83°
62°
12
82°
60°
13
84°
61°
14
83°
60°
15
82°
59°
16
82°
59°
17
83°
60°
18
83°
55°
19
Hist. Avg.
77°
58°
20
Hist. Avg.
77°
58°
21
Hist. Avg.
77°
57°
22
Hist. Avg.
76°
57°
23
Hist. Avg.
76°
57°
24
Hist. Avg.
76°
57°
25
Hist. Avg.
76°
57°
26
Hist. Avg.
76°
57°
27
Hist. Avg.
76°
57°
28
Hist. Avg.
75°
57°
29
Hist. Avg.
75°
56°
30
Hist. Avg.
75°
56°
31
Hist. Avg.
75°
56°
1
Hist. Avg.
74°
56°
2
Hist. Avg.
74°
56°
3
Hist. Avg.
74°
56°
4
Hist. Avg.
74°
55°
5
Hist. Avg.
73°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Sister Bay
Sister Bay's August 2026 forecast shows daily high temperatures ranging from 75° to 85°, with overnight lows between 52° and 63°. The average high for August is 82° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Sister Bay. See also: September | October | November.
