S
M
T
W
T
F
S
30
65°
52°
31
69°
51°
1
67°
53°
2
69°
52°
3
65°
52°
4
66°
53°
5
64°
51°
6
64°
51°
7
66°
50°
8
64°
55°
9
63°
49°
10
64°
50°
11
63°
53°
12
64°
52°
13
62°
53°
14
64°
52°
15
66°
48°
16
67°
49°
17
Hist. Avg.
64°
53°
18
Hist. Avg.
63°
53°
19
Hist. Avg.
63°
53°
20
Hist. Avg.
63°
52°
21
Hist. Avg.
63°
52°
22
Hist. Avg.
63°
52°
23
Hist. Avg.
63°
52°
24
Hist. Avg.
62°
52°
25
Hist. Avg.
62°
52°
26
Hist. Avg.
62°
52°
27
Hist. Avg.
62°
52°
28
Hist. Avg.
62°
52°
29
Hist. Avg.
61°
51°
30
Hist. Avg.
61°
51°
1
Hist. Avg.
61°
51°
2
Hist. Avg.
61°
51°
3
Hist. Avg.
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Copplestone
Copplestone's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 48° and 55°. The average high for September is 65° 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 Copplestone. See also: October | November | December.