S
M
T
W
T
F
S
26
48°
38°
27
44°
37°
28
51°
33°
29
43°
31°
30
45°
27°
1
45°
23°
2
64°
28°
3
64°
37°
4
59°
37°
5
39°
30°
6
41°
31°
7
52°
26°
8
62°
28°
9
53°
42°
10
50°
28°
11
61°
23°
12
58°
39°
13
67°
33°
14
74°
39°
15
78°
53°
16
64°
42°
17
61°
36°
18
55°
43°
19
48°
38°
20
60°
30°
21
66°
35°
22
61°
41°
23
59°
42°
24
78°
40°
25
87°
50°
26
90°
52°
27
83°
46°
28
82°
55°
29
89°
56°
30
81°
48°
31
83°
53°
1
80°
52°
2
83°
51°
3
78°
53°
4
77°
54°
5
77°
56°
6
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Coleraine
Coleraine's May 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 46° and 56°. The average high for May is 81° with an average low of 52°. 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 Coleraine. See also: June | July | August.
