S
M
T
W
T
F
S
26
63°
44°
27
62°
47°
28
56°
45°
29
63°
42°
30
70°
44°
1
65°
45°
2
59°
50°
3
57°
48°
4
56°
45°
5
54°
43°
6
53°
42°
7
54°
42°
8
57°
44°
9
56°
42°
10
57°
43°
11
58°
44°
12
58°
44°
13
59°
46°
14
58°
44°
15
61°
49°
16
58°
46°
17
59°
43°
18
59°
48°
19
60°
47°
20
59°
46°
21
59°
46°
22
60°
47°
23
59°
49°
24
60°
49°
25
60°
50°
26
61°
49°
27
60°
48°
28
60°
46°
29
61°
44°
30
63°
48°
31
62°
47°
1
61°
49°
2
62°
48°
3
64°
50°
4
65°
48°
5
64°
48°
6
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Old Colwyn
Old Colwyn's May 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 42° 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 Old Colwyn. See also: June | July | August.
