S
M
T
W
T
F
S
26
83°
61°
27
75°
55°
28
70°
50°
29
84°
59°
30
78°
61°
1
69°
58°
2
65°
49°
3
72°
44°
4
80°
45°
5
82°
51°
6
87°
61°
7
78°
59°
8
N/A
9
78°
60°
10
85°
63°
11
80°
53°
12
75°
53°
13
76°
57°
14
77°
52°
15
78°
56°
16
82°
61°
17
86°
61°
18
84°
63°
19
86°
65°
20
86°
64°
21
87°
60°
22
82°
63°
23
76°
62°
24
77°
62°
25
78°
61°
26
80°
64°
27
79°
64°
28
79°
62°
29
80°
64°
30
78°
64°
31
78°
65°
1
80°
65°
2
81°
66°
3
82°
65°
4
81°
66°
5
81°
67°
6
82°
66°
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 75° to 87°, with overnight lows between 52° and 67°. The average high for May is 80° with an average low of 62°. 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.
