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
75°
69°
10
80°
55°
11
72°
48°
12
77°
62°
13
76°
58°
14
75°
56°
15
74°
58°
16
72°
52°
17
72°
51°
18
66°
50°
19
65°
46°
20
67°
48°
21
68°
47°
22
64°
51°
23
65°
51°
24
67°
50°
25
68°
50°
26
71°
47°
27
64°
43°
28
67°
48°
29
70°
50°
30
71°
50°
1
71°
49°
2
69°
49°
3
68°
47°
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 64° to 80°, with overnight lows between 43° and 69°. The average high for September is 70° with an average low of 51°. 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.
