S
M
T
W
T
F
S
30
69°
58°
31
78°
52°
1
74°
55°
2
71°
59°
3
71°
56°
4
67°
50°
5
77°
55°
6
77°
51°
7
64°
54°
8
75°
59°
9
76°
53°
10
74°
58°
11
71°
52°
12
73°
51°
13
67°
56°
14
66°
57°
15
73°
57°
16
80°
50°
17
77°
51°
18
75°
51°
19
72°
50°
20
76°
49°
21
72°
51°
22
71°
55°
23
64°
52°
24
62°
49°
25
58°
52°
26
63°
47°
27
67°
45°
28
63°
46°
29
60°
50°
30
66°
48°
1
61°
51°
2
63°
54°
3
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Downtown Port Coquitlam
Downtown Port Coquitlam's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Downtown Port Coquitlam. See also: October | November | December.
