S
M
T
W
T
F
S
26
90°
68°
27
87°
67°
28
82°
64°
29
83°
56°
30
91°
57°
31
88°
61°
1
73°
66°
2
76°
53°
3
82°
53°
4
84°
59°
5
82°
61°
6
79°
57°
7
84°
57°
8
84°
59°
9
83°
60°
10
82°
59°
11
82°
60°
12
78°
57°
13
79°
55°
14
79°
54°
15
78°
56°
16
75°
59°
17
82°
60°
18
82°
61°
19
84°
60°
20
81°
59°
21
81°
59°
22
83°
61°
23
81°
60°
24
80°
59°
25
78°
59°
26
79°
58°
27
80°
58°
28
75°
57°
29
77°
57°
30
80°
58°
31
81°
57°
1
80°
56°
2
75°
55°
3
75°
56°
4
79°
56°
5
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lake Isabella
Lake Isabella's August 2026 forecast shows daily high temperatures ranging from 75° to 84°, with overnight lows between 53° and 61°. The average high for August is 80° with an average low of 58°. 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 Lake Isabella. See also: September | October | November.