S
M
T
W
T
F
S
26
67°
57°
27
68°
56°
28
68°
54°
29
69°
53°
30
69°
59°
1
69°
59°
2
69°
61°
3
70°
62°
4
68°
57°
5
67°
56°
6
69°
57°
7
69°
60°
8
72°
60°
9
73°
59°
10
71°
61°
11
72°
62°
12
73°
64°
13
74°
60°
14
71°
62°
15
70°
61°
16
71°
62°
17
69°
60°
18
69°
61°
19
70°
62°
20
68°
54°
21
66°
58°
22
65°
57°
23
66°
57°
24
69°
61°
25
72°
62°
26
70°
59°
27
67°
57°
28
66°
57°
29
66°
58°
30
67°
59°
31
69°
62°
1
72°
63°
2
72°
62°
3
70°
62°
4
66°
61°
5
66°
62°
6
66°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harborview
Harborview's May 2026 forecast shows daily high temperatures ranging from 65° to 74°, with overnight lows between 54° and 64°. The average high for May is 69° with an average low of 60°. 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 Harborview. See also: June | July | August.