S
M
T
W
T
F
S
30
80°
61°
31
83°
64°
1
85°
64°
2
85°
63°
3
84°
56°
4
83°
54°
5
77°
55°
6
78°
61°
7
80°
61°
8
82°
60°
9
83°
61°
10
78°
60°
11
82°
59°
12
82°
61°
13
81°
61°
14
81°
60°
15
82°
60°
16
82°
56°
17
80°
59°
18
80°
54°
19
79°
51°
20
74°
50°
21
71°
48°
22
71°
56°
23
72°
53°
24
75°
49°
25
70°
48°
26
70°
48°
27
72°
49°
28
76°
54°
29
75°
53°
30
75°
52°
1
68°
53°
2
68°
45°
3
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coplay
Coplay's September 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 45° and 64°. The average high for September is 77° with an average low of 56°. 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 Coplay. See also: October | November | December.
