S
M
T
W
T
F
S
26
72°
59°
27
72°
54°
28
77°
63°
29
77°
61°
30
72°
48°
31
68°
46°
1
68°
48°
2
72°
48°
3
73°
57°
4
79°
61°
5
68°
57°
6
63°
54°
7
68°
50°
8
81°
50°
9
70°
54°
10
70°
46°
11
79°
46°
12
84°
61°
13
91°
63°
14
82°
55°
15
68°
52°
16
66°
50°
17
66°
54°
18
70°
59°
19
70°
55°
20
63°
48°
21
63°
45°
22
64°
48°
23
70°
41°
24
68°
43°
25
68°
54°
26
79°
54°
27
70°
57°
28
73°
59°
29
70°
54°
30
72°
55°
31
70°
52°
1
66°
52°
2
66°
59°
3
70°
57°
4
68°
55°
5
68°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castleton
Castleton's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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. See also: September | October | November.
