S
M
T
W
T
F
S
26
86°
62°
27
87°
61°
28
91°
62°
29
91°
62°
30
93°
64°
31
94°
64°
1
93°
63°
2
90°
61°
3
93°
61°
4
85°
55°
5
84°
58°
6
84°
54°
7
85°
58°
8
93°
62°
9
93°
61°
10
94°
63°
11
93°
57°
12
89°
54°
13
87°
55°
14
84°
50°
15
82°
53°
16
85°
57°
17
91°
59°
18
93°
62°
19
95°
60°
20
92°
53°
21
89°
57°
22
93°
61°
23
95°
53°
24
82°
53°
25
83°
54°
26
84°
56°
27
87°
50°
28
85°
52°
29
84°
49°
30
79°
49°
31
82°
53°
1
87°
56°
2
89°
58°
3
88°
55°
4
79°
47°
5
77°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Okanogan
Okanogan's August 2026 forecast shows daily high temperatures ranging from 77° to 95°, with overnight lows between 47° and 64°. The average high for August is 88° with an average low of 57°. 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 Okanogan. See also: September | October | November.