S
M
T
W
T
F
S
30
69°
52°
31
70°
56°
1
69°
57°
2
68°
54°
3
68°
51°
4
69°
54°
5
67°
52°
6
67°
51°
7
68°
50°
8
68°
50°
9
72°
57°
10
71°
57°
11
73°
55°
12
74°
56°
13
73°
56°
14
66°
49°
15
70°
48°
16
71°
52°
17
72°
51°
18
73°
49°
19
72°
55°
20
71°
47°
21
64°
50°
22
70°
52°
23
71°
46°
24
67°
50°
25
68°
52°
26
69°
53°
27
70°
52°
28
63°
50°
29
60°
45°
30
59°
49°
1
59°
46°
2
57°
43°
3
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Squamish
Squamish's September 2026 forecast shows daily high temperatures ranging from 56° to 74°, with overnight lows between 42° and 57°. The average high for September is 68° with an average low of 51°. 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 Squamish. See also: October | November | December.
