S
M
T
W
T
F
S
28
68°
57°
29
68°
57°
30
66°
55°
1
64°
55°
2
59°
54°
3
70°
57°
4
66°
54°
5
68°
52°
6
73°
52°
7
72°
54°
8
70°
55°
9
72°
54°
10
72°
57°
11
68°
57°
12
66°
54°
13
68°
50°
14
73°
54°
15
75°
55°
16
73°
57°
17
71°
56°
18
74°
55°
19
75°
56°
20
79°
57°
21
80°
61°
22
78°
60°
23
77°
59°
24
75°
58°
25
75°
59°
26
74°
58°
27
75°
58°
28
75°
59°
29
74°
56°
30
68°
57°
31
69°
60°
1
72°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Lummi Island
Lummi Island's July 2026 forecast shows daily high temperatures ranging from 68° to 80°, with overnight lows between 55° and 61°. The average high for July is 74° 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 July weather will actually feel in Lummi Island. See also: August | September | October.
