S
M
T
W
T
F
S
30
73°
52°
31
67°
46°
1
64°
50°
2
67°
39°
3
72°
35°
4
69°
41°
5
55°
47°
6
52°
47°
7
62°
52°
8
57°
47°
9
57°
34°
10
62°
33°
11
60°
51°
12
56°
40°
13
72°
35°
14
65°
56°
15
67°
37°
16
69°
36°
17
65°
45°
18
58°
36°
19
53°
41°
20
53°
31°
21
59°
37°
22
57°
43°
23
58°
34°
24
67°
46°
25
N/A
26
67°
46°
27
62°
39°
28
62°
43°
29
58°
47°
30
62°
47°
1
63°
50°
2
62°
48°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Corner Brook
Corner Brook's September 2026 forecast shows daily high temperatures ranging from 58° to 67°, with overnight lows between 39° and 50°. The average high for September is 62° with an average low of 45°. 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 Corner Brook. See also: October | November | December.
