S
M
T
W
T
F
S
26
73°
55°
27
78°
54°
28
77°
60°
29
68°
54°
30
62°
44°
1
61°
42°
2
57°
38°
3
65°
35°
4
79°
53°
5
72°
59°
6
62°
46°
7
64°
44°
8
72°
42°
9
77°
56°
10
75°
56°
11
73°
49°
12
77°
44°
13
76°
45°
14
66°
45°
15
76°
64°
16
82°
67°
17
90°
68°
18
90°
71°
19
83°
64°
20
75°
58°
21
76°
60°
22
75°
58°
23
74°
56°
24
75°
57°
25
80°
62°
26
81°
58°
27
79°
63°
28
80°
64°
29
80°
63°
30
77°
59°
31
75°
58°
1
75°
57°
2
76°
56°
3
76°
57°
4
77°
58°
5
84°
65°
6
85°
66°
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 66° to 90°, with overnight lows between 45° and 71°. The average high for May is 79° with an average low of 60°. 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.
