S
M
T
W
T
F
S
26
63°
38°
27
63°
40°
28
65°
29°
29
67°
36°
30
64°
36°
1
57°
33°
2
62°
33°
3
67°
32°
4
67°
46°
5
58°
42°
6
55°
31°
7
68°
26°
8
74°
33°
9
78°
36°
10
74°
47°
11
79°
37°
12
86°
41°
13
84°
51°
14
80°
45°
15
81°
40°
16
81°
49°
17
76°
49°
18
69°
47°
19
70°
40°
20
68°
46°
21
75°
41°
22
74°
34°
23
75°
40°
24
75°
42°
25
73°
44°
26
64°
41°
27
70°
41°
28
74°
44°
29
72°
42°
30
71°
44°
31
68°
44°
1
71°
46°
2
71°
46°
3
70°
45°
4
71°
48°
5
74°
46°
6
77°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Costilla
Costilla's May 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 41° and 48°. The average high for May is 72° with an average low of 44°. 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 Costilla. See also: June | July | August.
