S
M
T
W
T
F
S
26
67°
49°
27
70°
57°
28
65°
42°
29
68°
47°
30
67°
42°
1
66°
48°
2
64°
49°
3
75°
50°
4
66°
45°
5
65°
44°
6
64°
43°
7
67°
50°
8
72°
45°
9
67°
46°
10
66°
45°
11
66°
45°
12
68°
56°
13
78°
58°
14
79°
59°
15
79°
57°
16
76°
50°
17
72°
57°
18
78°
58°
19
81°
60°
20
81°
58°
21
79°
53°
22
72°
52°
23
73°
52°
24
73°
51°
25
75°
54°
26
81°
59°
27
83°
59°
28
81°
60°
29
84°
60°
30
83°
59°
31
81°
54°
1
80°
53°
2
75°
53°
3
75°
52°
4
74°
54°
5
76°
55°
6
78°
63°
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 64° to 84°, with overnight lows between 42° and 63°. The average high for May is 74° with an average low of 52°. 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.
