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