S
M
T
W
T
F
S
28
66°
52°
29
68°
59°
30
70°
59°
1
70°
58°
2
69°
59°
3
69°
57°
4
68°
56°
5
69°
58°
6
70°
59°
7
72°
60°
8
71°
60°
9
72°
61°
10
74°
61°
11
71°
60°
12
71°
62°
13
74°
62°
14
75°
61°
15
72°
61°
16
72°
60°
17
73°
62°
18
74°
61°
19
75°
62°
20
75°
58°
21
77°
62°
22
76°
53°
23
79°
54°
24
70°
53°
25
71°
54°
26
72°
54°
27
72°
57°
28
73°
55°
29
72°
54°
30
73°
62°
31
79°
62°
1
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Washington Island
Washington Island's July 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 52° and 63°. The average high for July is 72° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Washington Island. See also: August | September | October.