S
M
T
W
T
F
S
26
63°
43°
27
64°
43°
28
64°
44°
29
62°
44°
30
62°
46°
31
63°
47°
1
62°
44°
2
63°
46°
3
64°
47°
4
67°
45°
5
64°
49°
6
63°
49°
7
64°
48°
8
63°
49°
9
66°
46°
10
68°
44°
11
67°
44°
12
66°
45°
13
65°
48°
14
64°
49°
15
65°
48°
16
64°
46°
17
65°
45°
18
65°
46°
19
66°
47°
20
Hist. Avg.
67°
40°
21
Hist. Avg.
67°
40°
22
Hist. Avg.
67°
40°
23
Hist. Avg.
67°
40°
24
Hist. Avg.
67°
40°
25
Hist. Avg.
68°
41°
26
Hist. Avg.
68°
41°
27
Hist. Avg.
68°
41°
28
Hist. Avg.
68°
41°
29
Hist. Avg.
68°
41°
30
Hist. Avg.
68°
41°
31
Hist. Avg.
69°
42°
1
Hist. Avg.
69°
42°
2
Hist. Avg.
69°
42°
3
Hist. Avg.
69°
42°
4
Hist. Avg.
69°
42°
5
Hist. Avg.
69°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Castle Hill
Castle Hill's August 2026 forecast shows daily high temperatures ranging from 62° to 68°, with overnight lows between 43° and 49°. The average high for August is 64° with an average low of 46°. 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.
