S
M
T
W
T
F
S
26
98°
56°
27
95°
57°
28
92°
60°
29
91°
59°
30
89°
57°
31
90°
57°
1
91°
59°
2
94°
59°
3
90°
58°
4
89°
58°
5
89°
57°
6
88°
57°
7
91°
59°
8
93°
58°
9
91°
59°
10
93°
59°
11
92°
58°
12
92°
59°
13
88°
59°
14
88°
58°
15
91°
59°
16
93°
59°
17
93°
58°
18
92°
59°
19
93°
59°
20
93°
58°
21
92°
58°
22
92°
57°
23
89°
58°
24
90°
55°
25
92°
56°
26
93°
57°
27
92°
56°
28
95°
58°
29
94°
57°
30
94°
56°
31
92°
55°
1
92°
56°
2
92°
58°
3
93°
57°
4
93°
54°
5
91°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Upper Lake
Upper Lake's August 2026 forecast shows daily high temperatures ranging from 88° to 98°, with overnight lows between 52° and 60°. The average high for August is 92° 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 Upper Lake. See also: September | October | November.
