S
M
T
W
T
F
S
26
94°
59°
27
92°
61°
28
91°
59°
29
96°
61°
30
96°
60°
31
95°
59°
1
94°
59°
2
94°
57°
3
93°
58°
4
91°
60°
5
92°
61°
6
96°
61°
7
95°
60°
8
95°
60°
9
94°
57°
10
93°
57°
11
91°
58°
12
91°
60°
13
93°
59°
14
94°
57°
15
91°
56°
16
89°
56°
17
88°
57°
18
91°
61°
19
92°
62°
20
95°
60°
21
94°
55°
22
90°
55°
23
89°
59°
24
88°
61°
25
91°
59°
26
91°
57°
27
88°
56°
28
88°
58°
29
93°
57°
30
88°
55°
31
86°
53°
1
Hist. Avg.
89°
51°
2
Hist. Avg.
89°
51°
3
Hist. Avg.
89°
51°
4
Hist. Avg.
89°
51°
5
Hist. Avg.
88°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Kelseyville
Kelseyville's August 2026 forecast shows daily high temperatures ranging from 86° to 96°, with overnight lows between 53° and 62°. 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 Kelseyville. See also: September | October | November.
