S
M
T
W
T
F
S
26
95°
60°
27
95°
58°
28
95°
58°
29
94°
57°
30
93°
58°
31
93°
55°
1
93°
57°
2
92°
57°
3
94°
56°
4
95°
58°
5
94°
59°
6
96°
59°
7
95°
58°
8
95°
59°
9
94°
59°
10
96°
58°
11
95°
54°
12
93°
53°
13
91°
51°
14
88°
52°
15
88°
54°
16
90°
55°
17
93°
57°
18
93°
56°
19
94°
54°
20
94°
55°
21
93°
56°
22
93°
56°
23
90°
51°
24
87°
50°
25
88°
51°
26
86°
51°
27
86°
50°
28
87°
50°
29
86°
51°
30
90°
55°
31
92°
55°
1
92°
54°
2
91°
54°
3
92°
52°
4
91°
55°
5
91°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Clearlake
Clearlake's August 2026 forecast shows daily high temperatures ranging from 86° to 96°, with overnight lows between 50° and 60°. The average high for August is 92° with an average low of 55°. 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 Clearlake. See also: September | October | November.
