S
M
T
W
T
F
S
26
81°
56°
27
82°
59°
28
79°
60°
29
77°
56°
30
76°
57°
31
78°
55°
1
79°
58°
2
80°
57°
3
76°
58°
4
78°
54°
5
80°
58°
6
77°
57°
7
79°
58°
8
75°
58°
9
78°
57°
10
75°
56°
11
73°
53°
12
73°
51°
13
74°
57°
14
75°
58°
15
78°
57°
16
79°
57°
17
74°
56°
18
76°
57°
19
76°
55°
20
75°
56°
21
75°
52°
22
72°
50°
23
72°
51°
24
76°
54°
25
78°
55°
26
78°
55°
27
77°
53°
28
70°
49°
29
70°
49°
30
72°
54°
31
77°
53°
1
77°
54°
2
76°
53°
3
76°
49°
4
68°
49°
5
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
Outdoor-Entertaining-May Weather in Londonderry
Londonderry's Outdoor-Entertaining-May 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 49° and 60°. The average high for Outdoor-Entertaining-May is 76° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how Outdoor-Entertaining-May weather will actually feel in Londonderry. See also: September | October | November.