S
M
T
W
T
F
S
26
82°
60°
27
83°
67°
28
76°
65°
29
73°
51°
30
69°
50°
1
61°
48°
2
61°
42°
3
65°
43°
4
73°
50°
5
77°
58°
6
75°
53°
7
72°
53°
8
73°
54°
9
75°
56°
10
78°
55°
11
74°
59°
12
79°
59°
13
76°
57°
14
71°
53°
15
72°
52°
16
73°
52°
17
74°
53°
18
75°
57°
19
78°
59°
20
79°
59°
21
81°
60°
22
83°
62°
23
83°
62°
24
84°
63°
25
84°
63°
26
83°
61°
27
78°
58°
28
78°
61°
29
82°
64°
30
82°
64°
31
83°
63°
1
86°
65°
2
86°
66°
3
85°
66°
4
84°
65°
5
85°
66°
6
84°
66°
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 61° to 86°, with overnight lows between 42° and 67°. The average high for May is 77° with an average low of 58°. 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.