S
M
T
W
T
F
S
30
72°
65°
31
74°
60°
1
75°
63°
2
77°
66°
3
78°
58°
4
76°
53°
5
71°
51°
6
73°
57°
7
72°
51°
8
68°
52°
9
69°
53°
10
70°
54°
11
68°
55°
12
68°
51°
13
66°
52°
14
65°
50°
15
66°
54°
16
72°
54°
17
70°
50°
18
63°
45°
19
64°
46°
20
72°
53°
21
72°
54°
22
73°
55°
23
73°
52°
24
71°
50°
25
70°
51°
26
70°
51°
27
71°
52°
28
71°
49°
29
67°
45°
30
60°
42°
1
59°
44°
2
66°
50°
3
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Copenhagen
Copenhagen's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 42° and 66°. The average high for September is 70° with an average low of 52°. 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 Copenhagen. See also: October | November | December.