S
M
T
W
T
F
S
26
62°
41°
27
72°
37°
28
62°
51°
29
57°
44°
30
49°
36°
1
42°
32°
2
43°
33°
3
58°
31°
4
71°
45°
5
70°
50°
6
53°
41°
7
56°
34°
8
60°
39°
9
65°
47°
10
59°
40°
11
58°
33°
12
65°
30°
13
68°
42°
14
48°
41°
15
64°
39°
16
70°
47°
17
83°
59°
18
86°
62°
19
83°
64°
20
66°
48°
21
67°
45°
22
62°
46°
23
54°
49°
24
69°
59°
25
77°
56°
26
77°
60°
27
75°
58°
28
78°
48°
29
75°
45°
30
70°
43°
31
71°
49°
1
71°
51°
2
72°
53°
3
72°
52°
4
73°
52°
5
74°
50°
6
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sligo
Sligo's May 2026 forecast shows daily high temperatures ranging from 54° to 78°, with overnight lows between 43° and 60°. The average high for May is 72° 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 Sligo. See also: June | July | August.