S
M
T
W
T
F
S
30
80°
58°
31
85°
62°
1
85°
62°
2
84°
61°
3
85°
55°
4
82°
53°
5
77°
54°
6
77°
59°
7
82°
58°
8
83°
59°
9
82°
60°
10
77°
58°
11
82°
59°
12
81°
59°
13
82°
60°
14
81°
59°
15
82°
59°
16
82°
56°
17
80°
57°
18
80°
51°
19
78°
49°
20
75°
48°
21
71°
47°
22
71°
54°
23
73°
50°
24
74°
47°
25
70°
46°
26
70°
46°
27
73°
47°
28
76°
52°
29
75°
51°
30
76°
50°
1
70°
51°
2
70°
44°
3
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trexlertown
Trexlertown's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 44° and 62°. The average high for September is 78° with an average low of 54°. 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 Trexlertown. See also: October | November | December.