S
M
T
W
T
F
S
26
61°
49°
27
62°
49°
28
63°
47°
29
62°
49°
30
61°
53°
1
61°
53°
2
61°
54°
3
64°
50°
4
64°
48°
5
62°
53°
6
64°
51°
7
62°
54°
8
58°
53°
9
59°
53°
10
60°
54°
11
64°
52°
12
60°
52°
13
63°
48°
14
65°
51°
15
66°
49°
16
66°
48°
17
67°
46°
18
72°
50°
19
71°
49°
20
65°
50°
21
64°
49°
22
63°
50°
23
67°
50°
24
66°
48°
25
65°
51°
26
68°
50°
27
63°
50°
28
64°
49°
29
63°
47°
30
64°
47°
31
67°
50°
1
68°
50°
2
71°
54°
3
71°
51°
4
63°
50°
5
66°
51°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castroville
Castroville's May 2026 forecast shows daily high temperatures ranging from 63° to 72°, with overnight lows between 46° 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 Castroville. See also: June | July | August.
