S
M
T
W
T
F
S
30
83°
54°
31
78°
67°
1
87°
69°
2
76°
69°
3
85°
70°
4
85°
62°
5
81°
56°
6
75°
58°
7
76°
59°
8
74°
58°
9
73°
57°
10
76°
58°
11
75°
58°
12
74°
58°
13
76°
56°
14
74°
54°
15
72°
57°
16
72°
58°
17
73°
51°
18
68°
49°
19
68°
49°
20
70°
54°
21
75°
57°
22
76°
57°
23
77°
56°
24
76°
55°
25
74°
53°
26
74°
54°
27
75°
55°
28
74°
55°
29
75°
51°
30
68°
48°
1
65°
45°
2
68°
51°
3
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Aetna
Mount Aetna's September 2026 forecast shows daily high temperatures ranging from 65° to 87°, with overnight lows between 45° and 70°. The average high for September is 75° 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 Mount Aetna. See also: October | November | December.
