S
M
T
W
T
F
S
28
90°
66°
29
91°
68°
30
91°
68°
1
92°
70°
2
92°
70°
3
91°
69°
4
93°
69°
5
92°
68°
6
92°
67°
7
91°
68°
8
90°
69°
9
92°
68°
10
91°
69°
11
89°
67°
12
88°
63°
13
87°
63°
14
87°
62°
15
88°
63°
16
87°
62°
17
86°
64°
18
88°
67°
19
92°
69°
20
94°
70°
21
94°
72°
22
93°
70°
23
88°
66°
24
91°
65°
25
90°
67°
26
92°
69°
27
91°
70°
28
94°
71°
29
95°
71°
30
94°
70°
31
95°
70°
1
95°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Altadena
Altadena's July 2026 forecast shows daily high temperatures ranging from 86° to 95°, with overnight lows between 62° and 72°. The average high for July is 91° with an average low of 68°. 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 Altadena. See also: August | September | October.
