S
M
T
W
T
F
S
26
93°
68°
27
92°
67°
28
90°
65°
29
89°
65°
30
91°
66°
31
95°
69°
1
95°
69°
2
93°
68°
3
92°
67°
4
89°
66°
5
86°
66°
6
91°
68°
7
94°
68°
8
94°
69°
9
95°
70°
10
93°
68°
11
90°
68°
12
87°
65°
13
84°
66°
14
83°
64°
15
85°
65°
16
88°
65°
17
91°
68°
18
94°
68°
19
97°
71°
20
94°
71°
21
94°
70°
22
95°
72°
23
95°
71°
24
96°
71°
25
98°
72°
26
94°
72°
27
96°
71°
28
93°
70°
29
95°
68°
30
91°
69°
31
92°
68°
1
90°
66°
2
87°
69°
3
87°
69°
4
88°
66°
5
92°
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 87° to 98°, with overnight lows between 66° and 72°. The average high for August is 93° with an average low of 70°. 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.
