S
M
T
W
T
F
S
26
63°
43°
27
57°
39°
28
55°
39°
29
59°
39°
30
64°
46°
1
63°
52°
2
61°
48°
3
52°
46°
4
57°
46°
5
54°
37°
6
54°
37°
7
57°
43°
8
54°
43°
9
54°
39°
10
57°
30°
11
54°
37°
12
54°
45°
13
N/A
14
54°
40°
15
53°
41°
16
53°
40°
17
53°
42°
18
58°
50°
19
59°
49°
20
63°
51°
21
66°
52°
22
66°
51°
23
63°
47°
24
61°
47°
25
62°
48°
26
57°
47°
27
57°
43°
28
58°
44°
29
57°
44°
30
57°
42°
31
58°
47°
1
59°
48°
2
63°
49°
3
62°
48°
4
63°
48°
5
60°
47°
6
59°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Londonderry
Londonderry's May 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 40° and 52°. The average high for May is 59° with an average low of 46°. 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.
