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°
48°
26
61°
43°
27
62°
45°
28
62°
53°
29
61°
49°
30
62°
52°
1
61°
48°
2
62°
49°
3
61°
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 58° to 62°, with overnight lows between 43° and 53°. The average high for September is 61° 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 New Westminster. See also: October | November | December.
