S
M
T
W
T
F
S
26
70°
50°
27
73°
50°
28
68°
50°
29
64°
46°
30
55°
41°
1
63°
36°
2
50°
36°
3
57°
28°
4
68°
43°
5
68°
54°
6
64°
50°
7
54°
39°
8
63°
34°
9
64°
46°
10
72°
46°
11
61°
41°
12
68°
39°
13
64°
52°
14
52°
36°
15
68°
34°
16
77°
50°
17
81°
59°
18
82°
64°
19
81°
64°
20
81°
61°
21
68°
61°
22
70°
59°
23
72°
60°
24
79°
62°
25
75°
64°
26
74°
63°
27
74°
64°
28
76°
64°
29
78°
59°
30
69°
54°
31
70°
53°
1
71°
58°
2
74°
59°
3
72°
60°
4
74°
59°
5
76°
58°
6
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castlewood
Castlewood's May 2026 forecast shows daily high temperatures ranging from 69° to 79°, with overnight lows between 53° and 64°. The average high for May is 74° 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 Castlewood. See also: June | July | August.