S
M
T
W
T
F
S
26
85°
74°
27
85°
74°
28
86°
74°
29
85°
74°
30
86°
74°
1
86°
75°
2
85°
74°
3
86°
75°
4
86°
75°
5
87°
74°
6
86°
75°
7
86°
75°
8
87°
74°
9
86°
75°
10
86°
76°
11
87°
76°
12
86°
75°
13
86°
76°
14
87°
76°
15
86°
75°
16
86°
76°
17
87°
75°
18
89°
74°
19
88°
73°
20
88°
74°
21
89°
74°
22
89°
73°
23
88°
73°
24
88°
74°
25
89°
73°
26
88°
73°
27
89°
74°
28
89°
74°
29
90°
73°
30
89°
73°
31
90°
74°
1
89°
75°
2
90°
74°
3
88°
75°
4
88°
75°
5
89°
74°
6
89°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castries
Castries's May 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 73° and 76°. The average high for May is 87° with an average low of 74°. 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 Castries. See also: June | July | August.
