S
M
T
W
T
F
S
26
77°
58°
27
76°
54°
28
77°
57°
29
77°
57°
30
78°
62°
1
77°
60°
2
76°
63°
3
78°
63°
4
78°
65°
5
72°
58°
6
75°
54°
7
71°
52°
8
68°
49°
9
70°
56°
10
70°
52°
11
71°
56°
12
72°
61°
13
72°
61°
14
69°
60°
15
70°
58°
16
69°
58°
17
70°
61°
18
70°
61°
19
68°
61°
20
68°
56°
21
66°
54°
22
66°
57°
23
67°
60°
24
68°
59°
25
67°
62°
26
68°
63°
27
71°
62°
28
N/A
29
67°
54°
30
68°
50°
31
67°
47°
1
64°
49°
2
62°
54°
3
69°
48°
4
67°
50°
5
67°
50°
6
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Castle Hill
Castle Hill's May 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 47° and 54°. The average high for May is 66° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Castle Hill. See also: June | July | August.
