S
M
T
W
T
F
S
30
67°
57°
31
68°
58°
1
66°
58°
2
66°
57°
3
69°
57°
4
73°
58°
5
73°
58°
6
72°
57°
7
68°
56°
8
69°
55°
9
68°
56°
10
64°
56°
11
64°
54°
12
63°
53°
13
62°
50°
14
62°
48°
15
63°
51°
16
64°
53°
17
63°
54°
18
61°
54°
19
62°
53°
20
61°
53°
21
60°
44°
22
62°
53°
23
64°
52°
24
66°
47°
25
68°
51°
26
67°
43°
27
59°
42°
28
56°
41°
29
57°
43°
30
56°
49°
1
56°
42°
2
57°
42°
3
59°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Westminster
New Westminster's September 2026 forecast shows daily high temperatures ranging from 56° to 73°, with overnight lows between 41° and 58°. The average high for September is 64° with an average low of 52°. 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 New Westminster. See also: October | November | December.
