S
M
T
W
T
F
S
26
34°
16°
27
38°
27°
28
46°
22°
29
56°
32°
30
66°
26°
1
77°
35°
2
69°
36°
3
70°
38°
4
45°
30°
5
48°
23°
6
54°
18°
7
64°
28°
8
54°
28°
9
54°
28°
10
65°
40°
11
54°
38°
12
67°
40°
13
70°
44°
14
64°
40°
15
68°
43°
16
63°
40°
17
61°
40°
18
59°
41°
19
61°
41°
20
63°
42°
21
65°
38°
22
64°
45°
23
67°
44°
24
65°
44°
25
68°
45°
26
70°
46°
27
71°
46°
28
70°
45°
29
71°
46°
30
68°
45°
31
66°
46°
1
72°
47°
2
68°
44°
3
61°
40°
4
60°
37°
5
61°
41°
6
63°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kilwinning
Kilwinning's May 2026 forecast shows daily high temperatures ranging from 54° to 72°, with overnight lows between 28° and 47°. The average high for May is 64° with an average low of 42°. 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 Kilwinning. See also: June | July | August.