S
M
T
W
T
F
S
26
64°
45°
27
64°
46°
28
55°
46°
29
66°
45°
30
72°
48°
1
59°
48°
2
61°
46°
3
61°
50°
4
63°
52°
5
59°
52°
6
57°
46°
7
59°
48°
8
64°
50°
9
66°
50°
10
55°
43°
11
57°
36°
12
57°
37°
13
55°
43°
14
52°
41°
15
59°
39°
16
54°
43°
17
57°
45°
18
54°
46°
19
59°
54°
20
59°
54°
21
70°
55°
22
72°
55°
23
64°
52°
24
N/A
25
89°
62°
26
89°
60°
27
85°
55°
28
76°
54°
29
70°
57°
30
74°
57°
31
68°
56°
1
66°
55°
2
66°
53°
3
64°
51°
4
62°
52°
5
64°
52°
6
63°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Cwmcarn
Cwmcarn's May 2026 forecast shows daily high temperatures ranging from 62° to 89°, with overnight lows between 51° and 62°. The average high for May is 72° with an average low of 55°. 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 Cwmcarn. See also: June | July | August.