S
M
T
W
T
F
S
26
50°
36°
27
50°
39°
28
53°
43°
29
55°
44°
30
56°
44°
1
54°
43°
2
54°
43°
3
52°
41°
4
52°
38°
5
51°
39°
6
53°
40°
7
52°
39°
8
53°
39°
9
56°
41°
10
58°
45°
11
59°
46°
12
56°
44°
13
54°
43°
14
54°
43°
15
55°
44°
16
55°
41°
17
54°
41°
18
54°
42°
19
55°
41°
20
54°
41°
21
53°
43°
22
59°
44°
23
57°
43°
24
57°
48°
25
60°
48°
26
59°
47°
27
62°
48°
28
62°
49°
29
63°
49°
30
62°
43°
31
61°
44°
1
61°
49°
2
62°
45°
3
60°
46°
4
63°
48°
5
60°
49°
6
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brecon/aberhonddu
Brecon/aberhonddu's May 2026 forecast shows daily high temperatures ranging from 50° to 63°, with overnight lows between 36° and 49°. The average high for May is 57° 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 Brecon/aberhonddu. See also: June | July | August.