S
M
T
W
T
F
S
26
64°
55°
27
66°
55°
28
66°
51°
29
67°
53°
30
66°
56°
1
67°
58°
2
66°
61°
3
67°
59°
4
66°
57°
5
65°
56°
6
67°
54°
7
66°
56°
8
69°
60°
9
68°
61°
10
68°
61°
11
69°
57°
12
66°
61°
13
69°
61°
14
68°
61°
15
68°
62°
16
69°
62°
17
69°
58°
18
68°
60°
19
72°
55°
20
74°
57°
21
71°
62°
22
68°
61°
23
68°
59°
24
67°
60°
25
67°
59°
26
65°
58°
27
66°
59°
28
66°
57°
29
67°
58°
30
68°
60°
31
69°
59°
1
71°
61°
2
70°
60°
3
68°
60°
4
69°
61°
5
63°
58°
6
68°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in La Costa
La Costa's May 2026 forecast shows daily high temperatures ranging from 63° to 71°, with overnight lows between 57° and 61°. The average high for May is 67° with an average low of 59°. 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 La Costa. See also: June | July | August.
