S
M
T
W
T
F
S
30
66°
48°
31
67°
57°
1
73°
57°
2
76°
51°
3
77°
54°
4
75°
47°
5
67°
49°
6
68°
52°
7
74°
54°
8
68°
52°
9
65°
53°
10
64°
54°
11
65°
53°
12
64°
51°
13
64°
49°
14
65°
52°
15
72°
52°
16
72°
46°
17
68°
45°
18
66°
45°
19
71°
52°
20
68°
52°
21
63°
45°
22
62°
47°
23
61°
45°
24
61°
43°
25
62°
44°
26
62°
43°
27
61°
50°
28
60°
49°
29
61°
47°
30
62°
48°
1
66°
50°
2
59°
46°
3
62°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coquitlam
Coquitlam's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 43° and 57°. The average high for September is 66° 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 September weather will actually feel in Coquitlam. See also: October | November | December.
