S
M
T
W
T
F
S
26
53°
40°
27
54°
42°
28
55°
45°
29
58°
46°
30
59°
46°
1
57°
45°
2
56°
46°
3
55°
44°
4
55°
42°
5
54°
43°
6
56°
42°
7
55°
41°
8
56°
41°
9
58°
44°
10
62°
47°
11
62°
48°
12
60°
47°
13
57°
47°
14
57°
45°
15
58°
46°
16
57°
45°
17
56°
44°
18
58°
43°
19
57°
44°
20
57°
45°
21
58°
44°
22
61°
48°
23
60°
45°
24
60°
49°
25
63°
50°
26
62°
50°
27
64°
49°
28
63°
50°
29
65°
51°
30
64°
47°
31
65°
48°
1
64°
51°
2
65°
46°
3
62°
49°
4
66°
50°
5
64°
51°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Barmouth
Barmouth's May 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 40° and 51°. The average high for May is 59° with an average low of 46°. 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 Barmouth. See also: June | July | August.
