S
M
T
W
T
F
S
30
74°
50°
31
71°
49°
1
71°
50°
2
72°
51°
3
70°
53°
4
70°
50°
5
73°
50°
6
72°
49°
7
70°
48°
8
69°
47°
9
69°
48°
10
70°
51°
11
68°
46°
12
68°
46°
13
70°
47°
14
71°
51°
15
70°
52°
16
72°
51°
17
69°
44°
18
67°
44°
19
68°
45°
20
70°
49°
21
66°
44°
22
66°
47°
23
69°
49°
24
70°
50°
25
71°
48°
26
70°
41°
27
68°
42°
28
62°
41°
29
61°
40°
30
62°
40°
1
62°
41°
2
Hist. Avg.
64°
45°
3
Hist. Avg.
64°
45°
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 74°, with overnight lows between 40° and 53°. The average high for September is 69° with an average low of 47°. 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.