S
M
T
W
T
F
S
30
78°
49°
31
69°
48°
1
70°
50°
2
71°
45°
3
71°
47°
4
75°
53°
5
75°
46°
6
71°
43°
7
69°
43°
8
68°
44°
9
66°
42°
10
65°
42°
11
66°
44°
12
71°
48°
13
72°
47°
14
73°
50°
15
75°
49°
16
71°
42°
17
64°
39°
18
63°
40°
19
64°
39°
20
69°
42°
21
69°
42°
22
63°
41°
23
65°
48°
24
61°
46°
25
60°
44°
26
59°
45°
27
57°
42°
28
57°
37°
29
56°
39°
30
57°
45°
1
56°
46°
2
58°
37°
3
59°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kootenay Bay
Kootenay Bay's September 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 35° and 53°. The average high for September is 66° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Kootenay Bay. See also: October | November | December.
