S
M
T
W
T
F
S
30
77°
54°
31
70°
64°
1
78°
66°
2
74°
67°
3
79°
64°
4
76°
56°
5
72°
53°
6
70°
53°
7
72°
52°
8
69°
49°
9
67°
50°
10
73°
51°
11
71°
53°
12
68°
52°
13
70°
50°
14
69°
49°
15
68°
52°
16
68°
53°
17
69°
45°
18
64°
43°
19
64°
44°
20
66°
48°
21
72°
52°
22
73°
52°
23
74°
51°
24
73°
50°
25
71°
48°
26
71°
49°
27
72°
50°
28
71°
49°
29
70°
46°
30
65°
43°
1
61°
40°
2
65°
46°
3
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountain Top
Mountain Top's September 2026 forecast shows daily high temperatures ranging from 61° to 79°, with overnight lows between 40° and 67°. 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 Mountain Top. See also: October | November | December.
