S
M
T
W
T
F
S
28
90°
68°
29
90°
64°
30
89°
62°
1
86°
62°
2
88°
61°
3
87°
59°
4
86°
64°
5
86°
63°
6
85°
64°
7
87°
62°
8
88°
60°
9
85°
63°
10
86°
64°
11
88°
64°
12
89°
65°
13
88°
66°
14
87°
67°
15
88°
66°
16
89°
64°
17
86°
66°
18
86°
66°
19
85°
67°
20
84°
66°
21
85°
67°
22
85°
69°
23
84°
69°
24
85°
65°
25
84°
63°
26
85°
67°
27
85°
69°
28
87°
68°
29
87°
68°
30
88°
67°
31
88°
69°
1
89°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Irwindale
Irwindale's July 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 59° and 70°. The average high for July is 87° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Irwindale. See also: August | September | October.