S
M
T
W
T
F
S
26
90°
70°
27
82°
66°
28
81°
64°
29
83°
55°
30
86°
59°
31
83°
65°
1
73°
62°
2
78°
56°
3
81°
58°
4
83°
64°
5
85°
59°
6
84°
61°
7
84°
62°
8
86°
61°
9
85°
62°
10
81°
60°
11
84°
58°
12
79°
63°
13
78°
61°
14
75°
54°
15
74°
53°
16
75°
61°
17
78°
59°
18
75°
56°
19
74°
56°
20
75°
57°
21
76°
53°
22
73°
52°
23
72°
52°
24
73°
53°
25
72°
52°
26
72°
51°
27
73°
55°
28
76°
55°
29
78°
58°
30
80°
59°
31
75°
60°
1
76°
59°
2
77°
52°
3
71°
50°
4
71°
52°
5
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castleton Township
Castleton Township's August 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 50° and 65°. The average high for August is 78° 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 August weather will actually feel in Castleton Township. See also: September | October | November.