S
M
T
W
T
F
S
26
52°
39°
27
52°
41°
28
54°
36°
29
54°
34°
30
50°
30°
1
54°
34°
2
68°
36°
3
70°
46°
4
57°
39°
5
46°
34°
6
45°
30°
7
59°
28°
8
72°
37°
9
57°
46°
10
59°
39°
11
70°
34°
12
66°
50°
13
73°
45°
14
79°
48°
15
82°
52°
16
75°
52°
17
72°
48°
18
63°
48°
19
50°
39°
20
61°
36°
21
66°
41°
22
55°
46°
23
64°
46°
24
82°
46°
25
86°
54°
26
88°
66°
27
88°
61°
28
84°
59°
29
N/A
30
77°
60°
31
76°
61°
1
80°
62°
2
83°
62°
3
87°
62°
4
81°
60°
5
79°
56°
6
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Cosmos
Cosmos's May 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 56° and 62°. The average high for May is 80° 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 Cosmos. See also: June | July | August.
