S
M
T
W
T
F
S
30
83°
74°
31
78°
73°
1
76°
72°
2
85°
72°
3
88°
70°
4
86°
69°
5
85°
66°
6
84°
64°
7
84°
65°
8
83°
70°
9
80°
64°
10
78°
63°
11
78°
66°
12
78°
65°
13
79°
65°
14
78°
61°
15
82°
60°
16
80°
65°
17
79°
64°
18
82°
64°
19
79°
65°
20
76°
61°
21
72°
56°
22
72°
56°
23
73°
55°
24
72°
61°
25
73°
61°
26
75°
60°
27
72°
61°
28
71°
61°
29
73°
56°
30
76°
57°
1
76°
59°
2
75°
59°
3
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cheonghak-dong
Cheonghak-dong's September 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 55° and 70°. The average high for September is 77° with an average low of 61°. 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 Cheonghak-dong. See also: October | November | December.