S
M
T
W
T
F
S
30
82°
56°
31
77°
67°
1
86°
68°
2
75°
68°
3
86°
69°
4
83°
60°
5
77°
56°
6
74°
58°
7
77°
58°
8
74°
56°
9
72°
57°
10
76°
59°
11
76°
58°
12
75°
56°
13
76°
56°
14
75°
55°
15
72°
59°
16
72°
60°
17
73°
53°
18
70°
50°
19
69°
50°
20
69°
54°
21
74°
57°
22
77°
58°
23
78°
58°
24
78°
57°
25
75°
54°
26
75°
55°
27
76°
56°
28
75°
56°
29
76°
55°
30
70°
51°
1
66°
48°
2
68°
53°
3
73°
54°
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 66° to 86°, with overnight lows between 48° and 69°. The average high for September is 75° 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 Boyertown. See also: October | November | December.
