S
M
T
W
T
F
S
26
71°
29°
27
58°
45°
28
56°
38°
29
70°
35°
30
77°
40°
1
77°
42°
2
75°
44°
3
85°
45°
4
78°
43°
5
64°
47°
6
58°
52°
7
68°
49°
8
62°
44°
9
70°
44°
10
68°
43°
11
74°
43°
12
83°
44°
13
59°
49°
14
60°
47°
15
51°
41°
16
59°
37°
17
64°
32°
18
68°
46°
19
65°
46°
20
70°
44°
21
78°
48°
22
73°
47°
23
67°
43°
24
66°
44°
25
61°
43°
26
63°
42°
27
63°
42°
28
64°
43°
29
65°
45°
30
67°
44°
31
70°
46°
1
71°
49°
2
74°
50°
3
74°
50°
4
72°
49°
5
70°
45°
6
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Washington State Capitol
Washington State Capitol's May 2026 forecast shows daily high temperatures ranging from 61° to 78°, with overnight lows between 42° and 50°. The average high for May is 69° with an average low of 46°. 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 Washington State Capitol. See also: June | July | August.
