S
M
T
W
T
F
S
26
92°
64°
27
99°
68°
28
90°
58°
29
67°
54°
30
70°
53°
1
73°
51°
2
86°
46°
3
87°
54°
4
91°
57°
5
86°
53°
6
73°
50°
7
84°
46°
8
89°
53°
9
92°
57°
10
77°
57°
11
87°
53°
12
89°
55°
13
98°
59°
14
96°
63°
15
90°
69°
16
89°
70°
17
88°
74°
18
91°
71°
19
75°
60°
20
72°
63°
21
73°
63°
22
78°
63°
23
85°
65°
24
82°
64°
25
81°
66°
26
84°
67°
27
84°
66°
28
82°
67°
29
83°
65°
30
87°
64°
31
86°
69°
1
84°
69°
2
85°
68°
3
83°
64°
4
82°
61°
5
83°
66°
6
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Shannon
Shannon's May 2026 forecast shows daily high temperatures ranging from 72° to 91°, with overnight lows between 60° and 74°. The average high for May is 83° with an average low of 66°. 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 Shannon. See also: June | July | August.