S
M
T
W
T
F
S
26
61°
48°
27
63°
46°
28
61°
46°
29
63°
43°
30
55°
46°
1
55°
48°
2
57°
48°
3
54°
48°
4
59°
46°
5
55°
45°
6
52°
45°
7
54°
41°
8
57°
45°
9
59°
45°
10
57°
39°
11
57°
43°
12
57°
46°
13
54°
45°
14
54°
43°
15
55°
41°
16
55°
43°
17
52°
43°
18
54°
45°
19
54°
50°
20
59°
50°
21
57°
54°
22
59°
52°
23
61°
48°
24
70°
47°
25
82°
55°
26
78°
53°
27
76°
56°
28
70°
54°
29
69°
53°
30
65°
52°
31
62°
51°
1
61°
50°
2
60°
49°
3
60°
48°
4
60°
48°
5
58°
49°
6
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glendalough
Glendalough's May 2026 forecast shows daily high temperatures ranging from 58° to 82°, with overnight lows between 46° and 56°. The average high for May is 66° with an average low of 51°. 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 Glendalough. See also: June | July | August.