S
M
T
W
T
F
S
26
65°
39°
27
71°
33°
28
68°
36°
29
66°
39°
30
53°
43°
1
58°
39°
2
53°
36°
3
52°
31°
4
68°
42°
5
79°
47°
6
64°
45°
7
55°
40°
8
52°
34°
9
52°
34°
10
65°
47°
11
56°
39°
12
58°
34°
13
57°
38°
14
55°
47°
15
58°
45°
16
75°
42°
17
83°
58°
18
87°
53°
19
89°
63°
20
86°
51°
21
65°
43°
22
69°
50°
23
60°
46°
24
60°
48°
25
65°
53°
26
75°
56°
27
74°
54°
28
76°
54°
29
77°
53°
30
74°
54°
31
73°
58°
1
77°
56°
2
78°
50°
3
77°
55°
4
78°
54°
5
78°
56°
6
77°
57°
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 60° to 86°, with overnight lows between 43° and 58°. The average high for May is 73° with an average low of 53°. 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.
