S
M
T
W
T
F
S
26
57°
43°
27
55°
42°
28
56°
46°
29
56°
45°
30
57°
46°
1
56°
48°
2
53°
46°
3
54°
45°
4
53°
45°
5
54°
46°
6
54°
43°
7
53°
43°
8
53°
44°
9
54°
48°
10
55°
46°
11
55°
49°
12
58°
49°
13
59°
50°
14
58°
49°
15
56°
48°
16
56°
48°
17
57°
49°
18
56°
50°
19
57°
49°
20
56°
50°
21
57°
49°
22
57°
50°
23
58°
50°
24
57°
49°
25
57°
50°
26
58°
51°
27
58°
51°
28
59°
50°
29
58°
52°
30
60°
51°
31
59°
49°
1
64°
52°
2
64°
52°
3
63°
50°
4
64°
49°
5
63°
51°
6
63°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ballygannon
Ballygannon's May 2026 forecast shows daily high temperatures ranging from 53° to 64°, with overnight lows between 42° and 52°. The average high for May is 57° with an average low of 48°. 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 Ballygannon. See also: June | July | August.