S
M
T
W
T
F
S
26
79°
54°
27
82°
54°
28
78°
53°
29
80°
53°
30
74°
50°
1
72°
54°
2
74°
51°
3
73°
47°
4
74°
48°
5
75°
49°
6
79°
53°
7
82°
55°
8
80°
56°
9
79°
55°
10
83°
55°
11
84°
56°
12
83°
57°
13
84°
58°
14
84°
57°
15
77°
54°
16
78°
55°
17
82°
57°
18
82°
57°
19
84°
54°
20
81°
54°
21
79°
53°
22
81°
54°
23
82°
59°
24
80°
59°
25
84°
61°
26
87°
60°
27
88°
59°
28
89°
57°
29
86°
63°
30
89°
63°
31
90°
58°
1
89°
61°
2
90°
61°
3
90°
63°
4
91°
64°
5
88°
63°
6
89°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Irmo
Irmo's May 2026 forecast shows daily high temperatures ranging from 72° to 91°, with overnight lows between 47° and 64°. The average high for May is 82° with an average low of 56°. 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 Irmo. See also: June | July | August.
