S
M
T
W
T
F
S
30
82°
56°
31
77°
67°
1
89°
69°
2
72°
69°
3
87°
68°
4
85°
71°
5
81°
63°
6
78°
59°
7
78°
51°
8
83°
60°
9
88°
67°
10
83°
62°
11
80°
53°
12
77°
60°
13
79°
63°
14
81°
61°
15
78°
60°
16
76°
57°
17
76°
56°
18
75°
58°
19
75°
57°
20
74°
53°
21
77°
58°
22
71°
57°
23
70°
57°
24
70°
56°
25
71°
56°
26
75°
55°
27
73°
53°
28
73°
55°
29
75°
56°
30
75°
56°
1
74°
55°
2
73°
54°
3
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pottstown
Pottstown's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 51° and 67°. 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 Pottstown. See also: October | November | December.
