S
M
T
W
T
F
S
30
84°
63°
31
83°
57°
1
79°
57°
2
79°
58°
3
81°
58°
4
84°
60°
5
83°
61°
6
83°
61°
7
80°
58°
8
80°
55°
9
77°
54°
10
77°
54°
11
78°
53°
12
77°
54°
13
76°
53°
14
75°
53°
15
76°
54°
16
77°
53°
17
76°
57°
18
79°
57°
19
75°
55°
20
Hist. Avg.
81°
58°
21
Hist. Avg.
81°
57°
22
Hist. Avg.
80°
57°
23
Hist. Avg.
80°
57°
24
Hist. Avg.
80°
56°
25
Hist. Avg.
79°
56°
26
Hist. Avg.
79°
55°
27
Hist. Avg.
79°
55°
28
Hist. Avg.
78°
54°
29
Hist. Avg.
78°
54°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
77°
53°
2
Hist. Avg.
77°
53°
3
Hist. Avg.
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Altamont
Altamont's September 2026 forecast shows daily high temperatures ranging from 75° to 84°, with overnight lows between 53° and 63°. The average high for September is 79° with an average low of 56°. 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.
