S
M
T
W
T
F
S
26
69°
49°
27
65°
49°
28
61°
46°
29
67°
48°
30
72°
49°
1
68°
50°
2
67°
49°
3
68°
50°
4
69°
49°
5
64°
49°
6
62°
48°
7
64°
50°
8
65°
46°
9
67°
50°
10
60°
49°
11
60°
48°
12
62°
46°
13
68°
48°
14
70°
51°
15
69°
52°
16
70°
50°
17
62°
45°
18
66°
49°
19
64°
48°
20
64°
50°
21
63°
50°
22
62°
47°
23
62°
51°
24
67°
52°
25
71°
53°
26
68°
49°
27
67°
49°
28
63°
47°
29
66°
47°
30
63°
48°
31
62°
48°
1
63°
47°
2
69°
49°
3
72°
53°
4
72°
55°
5
65°
54°
6
67°
56°
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 60° to 72°, with overnight lows between 45° and 56°. The average high for May is 66° with an average low of 49°. 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.
