S
M
T
W
T
F
S
30
76°
60°
31
77°
59°
1
71°
64°
2
70°
64°
3
83°
64°
4
83°
60°
5
76°
59°
6
73°
52°
7
80°
49°
8
79°
52°
9
79°
69°
10
79°
57°
11
72°
48°
12
77°
60°
13
81°
58°
14
75°
54°
15
75°
62°
16
75°
52°
17
70°
53°
18
71°
53°
19
65°
46°
20
65°
48°
21
68°
47°
22
67°
46°
23
65°
51°
24
67°
50°
25
62°
41°
26
63°
43°
27
63°
49°
28
66°
45°
29
61°
40°
30
62°
48°
1
64°
46°
2
60°
43°
3
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Altamont
Altamont's September 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 40° and 69°. The average high for September is 69° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Altamont. See also: October | November | December.
