S
M
T
W
T
F
S
30
72°
51°
31
77°
46°
1
76°
46°
2
70°
49°
3
71°
52°
4
75°
50°
5
76°
47°
6
76°
52°
7
69°
45°
8
67°
45°
9
68°
46°
10
72°
47°
11
74°
49°
12
74°
51°
13
70°
52°
14
66°
52°
15
65°
51°
16
65°
50°
17
66°
50°
18
64°
47°
19
65°
45°
20
64°
43°
21
65°
42°
22
63°
43°
23
64°
44°
24
68°
47°
25
70°
47°
26
69°
42°
27
63°
49°
28
60°
41°
29
Hist. Avg.
56°
40°
30
Hist. Avg.
56°
39°
1
Hist. Avg.
56°
39°
2
Hist. Avg.
55°
39°
3
Hist. Avg.
55°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cowichan Bay
Cowichan Bay's September 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 41° and 52°. The average high for September is 69° with an average low of 47°. 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 Cowichan Bay. See also: October | November | December.
