S
M
T
W
T
F
S
30
84°
71°
31
85°
70°
1
82°
69°
2
83°
70°
3
82°
69°
4
82°
68°
5
81°
69°
6
82°
68°
7
81°
68°
8
81°
67°
9
80°
67°
10
81°
66°
11
79°
66°
12
80°
67°
13
79°
67°
14
80°
68°
15
78°
66°
16
78°
68°
17
79°
67°
18
79°
67°
19
81°
66°
20
79°
65°
21
78°
66°
22
80°
68°
23
80°
67°
24
79°
66°
25
81°
67°
26
81°
64°
27
79°
61°
28
75°
59°
29
76°
60°
30
76°
60°
1
75°
62°
2
75°
64°
3
77°
64°
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 75° to 85°, with overnight lows between 59° and 71°. The average high for September is 80° with an average low of 66°. 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.