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
69°
54°
5
71°
53°
6
78°
57°
7
84°
59°
8
84°
59°
9
86°
63°
10
85°
63°
11
84°
64°
12
83°
62°
13
83°
63°
14
86°
62°
15
80°
61°
16
79°
60°
17
78°
58°
18
81°
62°
19
82°
61°
20
82°
62°
21
81°
62°
22
82°
61°
23
83°
63°
24
83°
63°
25
82°
62°
26
82°
63°
27
81°
62°
28
75°
61°
29
74°
60°
30
75°
60°
31
76°
62°
1
77°
63°
2
80°
62°
3
79°
62°
4
78°
61°
5
78°
60°
6
77°
59°
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 69° to 86°, with overnight lows between 53° and 64°. The average high for May is 80° with an average low of 61°. 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.
