S
M
T
W
T
F
S
26
77°
58°
27
65°
52°
28
75°
47°
29
82°
56°
30
74°
60°
1
68°
59°
2
62°
52°
3
69°
44°
4
78°
46°
5
80°
49°
6
87°
54°
7
76°
67°
8
72°
55°
9
78°
59°
10
83°
65°
11
89°
63°
12
72°
55°
13
74°
56°
14
81°
60°
15
77°
53°
16
83°
53°
17
89°
62°
18
90°
62°
19
90°
60°
20
91°
61°
21
89°
63°
22
88°
67°
23
85°
70°
24
88°
66°
25
84°
71°
26
N/A
27
89°
71°
28
86°
70°
29
84°
69°
30
80°
64°
31
79°
60°
1
77°
60°
2
80°
58°
3
79°
60°
4
79°
62°
5
84°
64°
6
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Washington
Washington's May 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 58° and 71°. The average high for May is 82° with an average low of 64°. 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. See also: June | July | August.
