S
M
T
W
T
F
S
30
78°
56°
31
76°
56°
1
75°
62°
2
75°
63°
3
82°
63°
4
83°
62°
5
82°
60°
6
78°
55°
7
77°
57°
8
77°
54°
9
74°
53°
10
73°
53°
11
73°
54°
12
75°
53°
13
75°
59°
14
79°
58°
15
73°
52°
16
72°
55°
17
71°
54°
18
72°
57°
19
74°
50°
20
73°
52°
21
72°
51°
22
76°
49°
23
70°
49°
24
69°
48°
25
70°
52°
26
71°
53°
27
72°
55°
28
73°
55°
29
74°
46°
30
68°
49°
1
67°
55°
2
73°
53°
3
72°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Boyertown
Boyertown's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 46° and 63°. The average high for September is 74° 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 Boyertown. See also: October | November | December.
