S
M
T
W
T
F
S
30
80°
63°
31
82°
63°
1
81°
61°
2
77°
59°
3
76°
60°
4
77°
60°
5
81°
61°
6
81°
61°
7
82°
62°
8
82°
62°
9
81°
61°
10
76°
59°
11
80°
61°
12
81°
61°
13
80°
60°
14
71°
48°
15
69°
49°
16
70°
55°
17
73°
54°
18
68°
47°
19
69°
51°
20
74°
52°
21
75°
55°
22
75°
55°
23
76°
45°
24
67°
46°
25
70°
51°
26
73°
54°
27
71°
51°
28
73°
43°
29
65°
44°
30
66°
46°
1
64°
51°
2
68°
52°
3
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Johnstown Township
Johnstown Township's September 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 43° and 63°. The average high for September is 74° with an average low of 55°. 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 Johnstown Township. See also: October | November | December.
