S
M
T
W
T
F
S
26
87°
51°
27
82°
51°
28
73°
47°
29
70°
41°
30
71°
42°
1
65°
46°
2
79°
36°
3
87°
38°
4
95°
59°
5
76°
48°
6
60°
45°
7
79°
37°
8
85°
49°
9
93°
45°
10
71°
50°
11
82°
41°
12
97°
58°
13
93°
62°
14
103°
61°
15
104°
66°
16
101°
71°
17
102°
69°
18
99°
50°
19
72°
55°
20
71°
59°
21
74°
59°
22
81°
57°
23
81°
57°
24
82°
59°
25
88°
61°
26
87°
60°
27
87°
62°
28
88°
60°
29
88°
63°
30
90°
65°
31
85°
59°
1
86°
63°
2
80°
62°
3
79°
57°
4
80°
57°
5
81°
63°
6
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Shamrock
Shamrock's May 2026 forecast shows daily high temperatures ranging from 71° to 99°, with overnight lows between 50° and 65°. The average high for May is 83° with an average low of 60°. 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 Shamrock. See also: June | July | August.