S
M
T
W
T
F
S
26
72°
43°
27
61°
41°
28
61°
44°
29
68°
37°
30
68°
41°
1
68°
45°
2
81°
47°
3
87°
49°
4
88°
52°
5
77°
49°
6
71°
41°
7
67°
45°
8
64°
50°
9
67°
51°
10
71°
50°
11
70°
51°
12
69°
50°
13
67°
49°
14
70°
50°
15
68°
49°
16
65°
45°
17
61°
44°
18
60°
43°
19
60°
42°
20
61°
42°
21
68°
49°
22
68°
49°
23
67°
46°
24
69°
49°
25
69°
46°
26
68°
48°
27
70°
50°
28
72°
51°
29
71°
50°
30
72°
51°
31
73°
52°
1
72°
52°
2
71°
51°
3
71°
50°
4
70°
48°
5
71°
46°
6
68°
47°
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 88°, with overnight lows between 41° and 52°. The average high for May is 70° with an average low of 48°. 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.
