S
M
T
W
T
F
S
26
68°
43°
27
57°
47°
28
56°
46°
29
66°
47°
30
75°
48°
1
72°
52°
2
74°
49°
3
81°
56°
4
77°
53°
5
63°
52°
6
57°
51°
7
64°
50°
8
62°
49°
9
69°
48°
10
66°
48°
11
72°
51°
12
82°
52°
13
61°
50°
14
59°
47°
15
53°
46°
16
56°
45°
17
64°
47°
18
67°
48°
19
69°
50°
20
72°
53°
21
76°
52°
22
66°
52°
23
69°
51°
24
68°
52°
25
70°
51°
26
68°
50°
27
68°
53°
28
63°
52°
29
63°
48°
30
65°
48°
31
71°
53°
1
71°
56°
2
63°
54°
3
63°
50°
4
64°
49°
5
63°
51°
6
63°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seattle
Seattle's May 2026 forecast shows daily high temperatures ranging from 53° to 76°, with overnight lows between 45° and 56°. The average high for May is 65° with an average low of 50°. 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 Seattle. See also: June | July | August.
