S
M
T
W
T
F
S
26
73°
55°
27
78°
54°
28
77°
60°
29
68°
54°
30
62°
44°
1
61°
38°
2
58°
35°
3
65°
48°
4
74°
59°
5
72°
57°
6
64°
43°
7
58°
42°
8
61°
48°
9
68°
49°
10
70°
51°
11
72°
54°
12
71°
55°
13
72°
52°
14
68°
54°
15
73°
59°
16
74°
58°
17
74°
60°
18
79°
61°
19
77°
61°
20
77°
60°
21
80°
62°
22
80°
62°
23
78°
61°
24
74°
58°
25
77°
62°
26
79°
63°
27
77°
61°
28
75°
62°
29
76°
60°
30
75°
56°
31
78°
63°
1
78°
63°
2
81°
64°
3
82°
61°
4
77°
57°
5
76°
57°
6
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Washington
Mount Washington's May 2026 forecast shows daily high temperatures ranging from 58° to 82°, with overnight lows between 35° and 64°. The average high for May is 73° with an average low of 56°. 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 Mount Washington. See also: June | July | August.
