S
M
T
W
T
F
S
26
67°
57°
27
68°
56°
28
68°
54°
29
69°
53°
30
69°
59°
1
69°
59°
2
69°
61°
3
70°
62°
4
68°
57°
5
67°
56°
6
69°
57°
7
69°
58°
8
70°
62°
9
70°
61°
10
70°
60°
11
70°
59°
12
69°
62°
13
71°
62°
14
70°
63°
15
70°
63°
16
70°
63°
17
68°
62°
18
69°
61°
19
74°
56°
20
78°
60°
21
72°
63°
22
70°
63°
23
70°
62°
24
68°
63°
25
70°
62°
26
69°
57°
27
68°
55°
28
70°
58°
29
72°
58°
30
72°
60°
31
73°
61°
1
73°
61°
2
73°
62°
3
76°
64°
4
72°
63°
5
73°
63°
6
71°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castle
Castle's May 2026 forecast shows daily high temperatures ranging from 68° to 76°, with overnight lows between 55° and 64°. The average high for May is 72° with an average low of 60°. 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. See also: June | July | August.
