S
M
T
W
T
F
S
30
64°
53°
31
76°
52°
1
70°
53°
2
65°
57°
3
67°
54°
4
64°
52°
5
74°
53°
6
76°
46°
7
70°
50°
8
72°
52°
9
72°
53°
10
69°
52°
11
61°
49°
12
73°
47°
13
72°
48°
14
73°
51°
15
75°
52°
16
71°
50°
17
79°
50°
18
78°
52°
19
73°
51°
20
74°
53°
21
63°
48°
22
63°
50°
23
62°
50°
24
62°
53°
25
63°
52°
26
61°
51°
27
59°
47°
28
59°
44°
29
58°
43°
30
58°
45°
1
65°
48°
2
66°
48°
3
65°
49°
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 58° to 79°, with overnight lows between 43° and 53°. The average high for September is 67° with an average low of 50°. 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.
