S
M
T
W
T
F
S
26
60°
29°
27
62°
39°
28
64°
34°
29
69°
36°
30
75°
36°
1
75°
39°
2
82°
42°
3
84°
40°
4
76°
43°
5
76°
47°
6
70°
44°
7
84°
44°
8
68°
42°
9
77°
44°
10
73°
46°
11
78°
44°
12
76°
40°
13
61°
48°
14
68°
46°
15
56°
40°
16
59°
38°
17
67°
38°
18
66°
36°
19
72°
43°
20
73°
45°
21
74°
38°
22
76°
43°
23
82°
48°
24
82°
49°
25
78°
51°
26
68°
54°
27
80°
54°
28
85°
53°
29
78°
54°
30
68°
49°
31
63°
49°
1
57°
45°
2
64°
47°
3
74°
52°
4
73°
52°
5
73°
50°
6
68°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kootenay Bay
Kootenay Bay's May 2026 forecast shows daily high temperatures ranging from 57° to 74°, with overnight lows between 45° and 52°. The average high for May is 68° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Kootenay Bay. See also: June | July | August.