S
M
T
W
T
F
S
26
85°
58°
27
84°
57°
28
81°
56°
29
85°
58°
30
86°
59°
31
86°
60°
1
85°
59°
2
87°
63°
3
89°
63°
4
89°
63°
5
90°
62°
6
90°
63°
7
89°
62°
8
88°
60°
9
87°
62°
10
88°
62°
11
89°
61°
12
88°
59°
13
87°
61°
14
89°
62°
15
88°
62°
16
83°
54°
17
78°
54°
18
85°
60°
19
88°
61°
20
87°
61°
21
87°
60°
22
88°
62°
23
87°
61°
24
87°
60°
25
86°
60°
26
87°
61°
27
86°
60°
28
86°
59°
29
85°
59°
30
80°
58°
31
79°
52°
1
84°
51°
2
84°
54°
3
83°
55°
4
84°
56°
5
82°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lake Chelan State Park
Lake Chelan State Park's August 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 50° and 63°. The average high for August is 86° with an average low of 59°. 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 Chelan State Park. See also: September | October | November.
