S
M
T
W
T
F
S
26
51°
29°
27
53°
30°
28
54°
29°
29
54°
31°
30
55°
30°
1
56°
33°
2
55°
32°
3
56°
31°
4
61°
40°
5
67°
35°
6
58°
31°
7
58°
34°
8
68°
42°
9
70°
43°
10
70°
37°
11
59°
33°
12
60°
34°
13
62°
41°
14
61°
40°
15
60°
41°
16
61°
43°
17
63°
43°
18
67°
38°
19
69°
37°
20
67°
36°
21
66°
35°
22
64°
36°
23
65°
35°
24
64°
35°
25
67°
38°
26
71°
40°
27
71°
37°
28
68°
36°
29
67°
43°
30
71°
43°
31
69°
41°
1
68°
48°
2
69°
45°
3
69°
42°
4
70°
49°
5
76°
49°
6
73°
46°
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 51° to 76°, with overnight lows between 29° and 49°. The average high for May is 64° with an average low of 38°. 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.
