S
M
T
W
T
F
S
26
68°
56°
27
68°
53°
28
68°
49°
29
68°
48°
30
69°
49°
1
69°
51°
2
69°
61°
3
69°
61°
4
68°
54°
5
68°
54°
6
69°
51°
7
69°
52°
8
69°
61°
9
68°
60°
10
70°
54°
11
68°
53°
12
68°
54°
13
71°
56°
14
70°
61°
15
70°
62°
16
68°
61°
17
68°
57°
18
69°
52°
19
N/A
20
76°
58°
21
74°
58°
22
70°
58°
23
70°
61°
24
69°
62°
25
70°
61°
26
68°
60°
27
67°
59°
28
69°
62°
29
70°
61°
30
71°
60°
31
69°
61°
1
71°
61°
2
70°
60°
3
68°
58°
4
66°
57°
5
68°
61°
6
72°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Castle Park
Castle Park's May 2026 forecast shows daily high temperatures ranging from 66° to 76°, with overnight lows between 57° and 62°. The average high for May is 70° 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 Park. See also: June | July | August.