S
M
T
W
T
F
S
26
81°
60°
27
81°
59°
28
71°
61°
29
82°
63°
30
72°
57°
1
66°
54°
2
68°
45°
3
71°
39°
4
79°
43°
5
78°
48°
6
78°
66°
7
71°
53°
8
69°
51°
9
73°
54°
10
81°
58°
11
78°
57°
12
77°
58°
13
80°
57°
14
75°
48°
15
80°
47°
16
85°
52°
17
90°
62°
18
88°
65°
19
88°
67°
20
86°
67°
21
87°
66°
22
83°
67°
23
86°
66°
24
82°
67°
25
84°
69°
26
83°
68°
27
83°
67°
28
85°
68°
29
83°
67°
30
82°
63°
31
85°
64°
1
87°
67°
2
88°
68°
3
85°
67°
4
82°
66°
5
82°
64°
6
84°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blue Mountain
Blue Mountain's May 2026 forecast shows daily high temperatures ranging from 82° to 88°, with overnight lows between 63° and 69°. The average high for May is 85° with an average low of 67°. 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 Blue Mountain. See also: June | July | August.