S
M
T
W
T
F
S
26
64°
51°
27
71°
47°
28
74°
46°
29
78°
50°
30
80°
52°
1
80°
58°
2
86°
53°
3
87°
57°
4
79°
61°
5
74°
51°
6
83°
54°
7
89°
55°
8
95°
58°
9
96°
61°
10
95°
63°
11
100°
63°
12
101°
65°
13
95°
76°
14
93°
67°
15
95°
64°
16
91°
72°
17
89°
52°
18
69°
48°
19
77°
48°
20
83°
54°
21
90°
56°
22
89°
67°
23
92°
62°
24
92°
65°
25
89°
66°
26
90°
68°
27
82°
64°
28
82°
61°
29
75°
58°
30
84°
57°
31
91°
58°
1
95°
62°
2
98°
66°
3
99°
67°
4
101°
67°
5
102°
67°
6
100°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Washington
Washington's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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.
