S
M
T
W
T
F
S
26
83°
59°
27
80°
57°
28
82°
59°
29
85°
60°
30
86°
60°
31
85°
57°
1
76°
51°
2
76°
52°
3
82°
59°
4
85°
59°
5
86°
58°
6
86°
60°
7
78°
53°
8
83°
58°
9
87°
59°
10
84°
55°
11
76°
52°
12
77°
53°
13
81°
56°
14
84°
56°
15
84°
58°
16
80°
55°
17
79°
55°
18
79°
51°
19
76°
53°
20
79°
47°
21
75°
48°
22
75°
49°
23
78°
50°
24
83°
50°
25
79°
46°
26
72°
49°
27
73°
50°
28
76°
47°
29
77°
59°
30
83°
55°
31
80°
54°
1
81°
53°
2
81°
52°
3
80°
53°
4
78°
50°
5
80°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Kootenay Bay
Kootenay Bay's August 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 46° and 60°. The average high for August is 80° with an average low of 54°. 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 Kootenay Bay. See also: September | October | November.