S
M
T
W
T
F
S
26
63°
35°
27
69°
36°
28
60°
39°
29
53°
46°
30
52°
44°
1
50°
38°
2
53°
37°
3
54°
37°
4
57°
41°
5
59°
43°
6
59°
43°
7
60°
42°
8
62°
41°
9
59°
42°
10
61°
42°
11
61°
41°
12
62°
44°
13
62°
46°
14
63°
42°
15
61°
40°
16
61°
41°
17
59°
41°
18
60°
42°
19
65°
48°
20
64°
45°
21
63°
42°
22
62°
43°
23
62°
42°
24
63°
45°
25
64°
48°
26
65°
47°
27
64°
46°
28
64°
45°
29
69°
52°
30
74°
52°
31
71°
50°
1
70°
53°
2
73°
55°
3
75°
53°
4
67°
52°
5
75°
50°
6
68°
51°
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 50° to 75°, with overnight lows between 35° and 55°. The average high for May is 63° with an average low of 44°. 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.
