S
M
T
W
T
F
S
26
65°
53°
27
66°
53°
28
74°
49°
29
75°
51°
30
75°
54°
1
78°
57°
2
76°
55°
3
67°
57°
4
67°
53°
5
65°
54°
6
75°
51°
7
81°
58°
8
82°
58°
9
84°
58°
10
87°
61°
11
93°
60°
12
86°
62°
13
79°
61°
14
79°
59°
15
76°
61°
16
75°
60°
17
76°
59°
18
76°
59°
19
75°
58°
20
78°
59°
21
72°
56°
22
73°
55°
23
74°
56°
24
78°
59°
25
81°
60°
26
81°
58°
27
76°
56°
28
74°
56°
29
75°
57°
30
78°
59°
31
80°
61°
1
82°
62°
2
82°
61°
3
78°
59°
4
75°
61°
5
75°
61°
6
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Irwindale
Irwindale's May 2026 forecast shows daily high temperatures ranging from 72° to 93°, with overnight lows between 55° and 62°. The average high for May is 79° with an average low of 59°. 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 Irwindale. See also: June | July | August.
