S
M
T
W
T
F
S
26
63°
46°
27
76°
45°
28
77°
54°
29
62°
49°
30
54°
44°
1
52°
38°
2
47°
37°
3
61°
46°
4
76°
58°
5
74°
52°
6
56°
41°
7
57°
38°
8
54°
43°
9
60°
45°
10
63°
51°
11
61°
43°
12
65°
46°
13
64°
50°
14
64°
52°
15
65°
50°
16
66°
48°
17
75°
54°
18
75°
53°
19
70°
51°
20
76°
53°
21
73°
52°
22
70°
45°
23
64°
46°
24
66°
46°
25
66°
48°
26
67°
48°
27
67°
47°
28
68°
47°
29
69°
48°
30
68°
48°
31
72°
57°
1
70°
52°
2
71°
50°
3
71°
56°
4
73°
56°
5
73°
55°
6
79°
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 54° to 79°, with overnight lows between 38° and 58°. The average high for May is 68° with an average low of 50°. 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.
