S
M
T
W
T
F
S
26
63°
34°
27
61°
45°
28
54°
36°
29
61°
36°
30
66°
36°
1
73°
32°
2
63°
48°
3
52°
46°
4
59°
43°
5
54°
37°
6
52°
36°
7
55°
37°
8
61°
46°
9
52°
43°
10
54°
36°
11
50°
37°
12
59°
39°
13
52°
41°
14
55°
39°
15
52°
39°
16
59°
37°
17
57°
45°
18
61°
41°
19
61°
48°
20
61°
52°
21
66°
54°
22
79°
54°
23
68°
50°
24
77°
50°
25
88°
59°
26
77°
53°
27
65°
47°
28
75°
56°
29
69°
51°
30
72°
54°
31
69°
55°
1
70°
55°
2
65°
51°
3
63°
50°
4
63°
49°
5
62°
48°
6
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Londonderry
Londonderry's May 2026 forecast shows daily high temperatures ranging from 62° to 88°, with overnight lows between 47° and 59°. The average high for May is 69° 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 Londonderry. See also: June | July | August.
