S
M
T
W
T
F
S
26
90°
61°
27
88°
60°
28
86°
59°
29
89°
60°
30
89°
61°
31
88°
61°
1
88°
60°
2
89°
61°
3
87°
60°
4
85°
59°
5
84°
59°
6
83°
58°
7
83°
59°
8
86°
59°
9
85°
58°
10
85°
57°
11
82°
55°
12
82°
56°
13
83°
56°
14
82°
57°
15
84°
56°
16
83°
57°
17
85°
56°
18
86°
57°
19
87°
55°
20
86°
56°
21
86°
55°
22
85°
60°
23
85°
60°
24
86°
57°
25
85°
58°
26
85°
57°
27
86°
56°
28
85°
56°
29
84°
55°
30
86°
55°
31
90°
56°
1
90°
59°
2
85°
54°
3
84°
54°
4
84°
55°
5
85°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castle Hill
Castle Hill's August 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 54° and 61°. The average high for August is 86° with an average low of 58°. 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 Castle Hill. See also: September | October | November.
