S
M
T
W
T
F
S
30
85°
58°
31
80°
67°
1
91°
74°
2
82°
71°
3
89°
74°
4
87°
68°
5
81°
63°
6
77°
58°
7
78°
60°
8
79°
59°
9
75°
58°
10
78°
60°
11
78°
61°
12
80°
58°
13
79°
59°
14
78°
58°
15
75°
60°
16
75°
62°
17
76°
54°
18
73°
53°
19
72°
52°
20
73°
55°
21
77°
60°
22
80°
60°
23
81°
59°
24
80°
58°
25
78°
55°
26
78°
57°
27
79°
58°
28
78°
58°
29
79°
57°
30
72°
52°
1
68°
50°
2
71°
53°
3
75°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Collingswood
Collingswood's September 2026 forecast shows daily high temperatures ranging from 68° to 91°, with overnight lows between 50° and 74°. The average high for September is 78° with an average low of 59°. 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 Collingswood. See also: October | November | December.
