S
M
T
W
T
F
S
26
82°
59°
27
81°
57°
28
83°
56°
29
87°
61°
30
88°
62°
31
90°
61°
1
88°
60°
2
84°
59°
3
84°
59°
4
85°
58°
5
90°
62°
6
90°
63°
7
90°
62°
8
89°
60°
9
88°
61°
10
84°
60°
11
88°
62°
12
89°
62°
13
89°
63°
14
88°
62°
15
88°
62°
16
87°
61°
17
88°
58°
18
82°
54°
19
86°
60°
20
88°
61°
21
86°
58°
22
79°
57°
23
77°
55°
24
85°
60°
25
87°
60°
26
87°
59°
27
86°
60°
28
86°
58°
29
85°
58°
30
84°
57°
31
85°
58°
1
85°
59°
2
84°
58°
3
84°
59°
4
85°
57°
5
86°
57°
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 77° to 90°, with overnight lows between 54° 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.
