S
M
T
W
T
F
S
30
81°
56°
31
76°
66°
1
88°
68°
2
73°
68°
3
87°
67°
4
83°
70°
5
80°
62°
6
78°
58°
7
78°
53°
8
83°
61°
9
86°
68°
10
81°
61°
11
79°
53°
12
78°
62°
13
78°
63°
14
83°
60°
15
80°
65°
16
77°
56°
17
75°
58°
18
72°
53°
19
75°
50°
20
72°
54°
21
73°
53°
22
70°
57°
23
70°
57°
24
71°
56°
25
72°
55°
26
77°
55°
27
72°
51°
28
73°
55°
29
76°
56°
30
77°
56°
1
76°
55°
2
75°
55°
3
75°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hellertown
Hellertown's September 2026 forecast shows daily high temperatures ranging from 70° to 86°, with overnight lows between 50° and 68°. The average high for September is 76° with an average low of 57°. 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 Hellertown. See also: October | November | December.
