S
M
T
W
T
F
S
30
73°
56°
31
73°
57°
1
73°
54°
2
72°
53°
3
70°
55°
4
71°
53°
5
69°
54°
6
68°
55°
7
70°
56°
8
69°
56°
9
66°
55°
10
66°
52°
11
68°
54°
12
72°
55°
13
70°
55°
14
66°
54°
15
65°
51°
16
67°
53°
17
69°
54°
18
69°
54°
19
64°
52°
20
67°
53°
21
70°
53°
22
69°
52°
23
70°
53°
24
68°
53°
25
66°
52°
26
66°
53°
27
67°
51°
28
66°
52°
29
65°
51°
30
66°
51°
1
67°
50°
2
65°
50°
3
60°
48°
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 60° to 73°, with overnight lows between 48° and 57°. The average high for September is 68° with an average low of 53°. 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.
