S
M
T
W
T
F
S
30
83°
64°
31
81°
66°
1
90°
68°
2
93°
72°
3
90°
68°
4
77°
66°
5
78°
61°
6
77°
54°
7
77°
52°
8
81°
53°
9
78°
67°
10
76°
57°
11
76°
47°
12
85°
58°
13
75°
44°
14
70°
57°
15
76°
60°
16
73°
64°
17
77°
55°
18
74°
56°
19
69°
59°
20
66°
51°
21
69°
49°
22
69°
50°
23
70°
49°
24
72°
51°
25
72°
50°
26
71°
45°
27
74°
52°
28
73°
51°
29
71°
51°
30
69°
52°
1
71°
50°
2
71°
48°
3
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Castleton Township
Castleton Township's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 44° and 64°. The average high for September is 72° 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 Castleton Township. See also: October | November | December.
