S
M
T
W
T
F
S
30
77°
62°
31
75°
63°
1
80°
62°
2
78°
58°
3
75°
54°
4
77°
60°
5
80°
59°
6
79°
59°
7
81°
60°
8
82°
60°
9
82°
61°
10
81°
61°
11
76°
59°
12
75°
50°
13
79°
55°
14
75°
49°
15
78°
48°
16
76°
44°
17
71°
47°
18
71°
47°
19
72°
43°
20
69°
44°
21
69°
45°
22
68°
43°
23
71°
45°
24
75°
49°
25
77°
54°
26
77°
52°
27
73°
49°
28
76°
52°
29
70°
42°
30
72°
52°
1
72°
39°
2
75°
39°
3
73°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cornwall Township
Cornwall Township's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 38° and 63°. The average high for September is 75° with an average low of 52°. 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 Cornwall Township. See also: October | November | December.
