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
73°
51°
6
69°
52°
7
67°
51°
8
63°
51°
9
67°
52°
10
74°
53°
11
74°
52°
12
67°
50°
13
69°
51°
14
71°
51°
15
69°
52°
16
70°
53°
17
71°
52°
18
66°
48°
19
61°
47°
20
62°
46°
21
71°
53°
22
70°
52°
23
66°
49°
24
71°
54°
25
71°
53°
26
69°
51°
27
72°
55°
28
73°
55°
29
72°
54°
30
73°
56°
31
74°
57°
1
74°
56°
2
72°
55°
3
73°
56°
4
72°
53°
5
72°
53°
6
71°
54°
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 61° to 74°, with overnight lows between 46° and 57°. The average high for May is 70° with an average low of 52°. 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.
