S
M
T
W
T
F
S
26
78°
55°
27
78°
56°
28
79°
57°
29
79°
57°
30
81°
58°
31
83°
62°
1
84°
62°
2
85°
61°
3
86°
63°
4
86°
62°
5
85°
55°
6
77°
55°
7
76°
54°
8
77°
55°
9
78°
55°
10
79°
56°
11
81°
59°
12
82°
60°
13
83°
61°
14
82°
60°
15
80°
62°
16
84°
56°
17
83°
59°
18
77°
55°
19
75°
54°
20
77°
54°
21
78°
59°
22
75°
59°
23
75°
57°
24
76°
55°
25
79°
59°
26
81°
54°
27
76°
51°
28
75°
57°
29
74°
59°
30
79°
58°
31
80°
58°
1
81°
57°
2
79°
57°
3
80°
54°
4
78°
49°
5
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Altamont
Altamont's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 49° and 63°. The average high for August is 80° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Altamont. See also: September | October | November.