S
M
T
W
T
F
S
26
81°
54°
27
81°
52°
28
75°
61°
29
75°
54°
30
64°
46°
1
68°
41°
2
64°
41°
3
66°
36°
4
79°
41°
5
75°
52°
6
72°
54°
7
66°
45°
8
73°
39°
9
75°
48°
10
82°
50°
11
72°
46°
12
77°
43°
13
79°
54°
14
70°
43°
15
79°
39°
16
82°
55°
17
90°
57°
18
86°
63°
19
86°
64°
20
81°
64°
21
75°
65°
22
75°
64°
23
77°
64°
24
80°
65°
25
73°
62°
26
77°
64°
27
78°
63°
28
75°
62°
29
75°
60°
30
79°
63°
31
78°
61°
1
77°
60°
2
78°
56°
3
75°
60°
4
74°
59°
5
76°
61°
6
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Altamont
Altamont's May 2026 forecast shows daily high temperatures ranging from 73° to 81°, with overnight lows between 56° and 65°. The average high for May is 77° with an average low of 62°. 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 Altamont. See also: June | July | August.