S
M
T
W
T
F
S
26
77°
56°
27
76°
52°
28
63°
47°
29
62°
42°
30
67°
38°
1
65°
33°
2
63°
37°
3
77°
45°
4
82°
52°
5
59°
49°
6
61°
43°
7
69°
38°
8
62°
47°
9
83°
50°
10
69°
45°
11
81°
43°
12
82°
53°
13
77°
47°
14
78°
45°
15
86°
58°
16
87°
63°
17
85°
65°
18
78°
63°
19
65°
52°
20
66°
47°
21
67°
56°
22
67°
57°
23
78°
53°
24
83°
56°
25
84°
62°
26
83°
63°
27
77°
62°
28
75°
60°
29
79°
61°
30
74°
54°
31
73°
56°
1
78°
57°
2
79°
56°
3
80°
58°
4
78°
60°
5
80°
59°
6
80°
64°
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 84°, with overnight lows between 53° and 64°. The average high for May is 79° with an average low of 59°. 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.