Dongdaemun Gu, Seoul, Seoul, South Korea Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Dongdaemun Gu, Seoul, Seoul, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (8th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 45 of Good air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Sep - 10th Sep 2025
Dongdaemun Gu, Seoul, Seoul, South Korea
5 AM9th Sep 2025
7 PM
4 AM10th Sep 2025
AQI
AQI
69AQI
43AQI
In the last 24 hours,
Dongdaemun Gu's AQI reached its highest point of 69 at 7 PM during the Night, while the lowest point, 43, was recorded at 8 AM during the Night between 9th Sep and 10th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Dongdaemun Gu, Seoul, Seoul, South Korea
27°C24/31°C
28°C22/33°C
24°C23/25°C
25°C24/29°C
27°C23/31°C
27°C24/31°C
27°C24/31°C
28°C25/32°C
28°C24/32°C
28°C24/32°C
29°C25/33°C
29°C25/33°C
29°C25/33°C
30°C26/34°C
29°C26/34°C
27°C24/31°C
27°C23/33°C
27°C24/32°C
27°C25/32°C
28°C24/32°C
28°C24/33°C
25°C23/28°C
26°C22/31°C
27°C22/32°C
24°C22/29°C
27°C22/33°C
27°C24/32°C
26°C23/29°C
25°C21/31°C
--°C/°C
--°C/°C
49AQI
44AQI
49AQI
47AQI
2025 Days Vs Air Quality
Dongdaemun Gu, Seoul, Seoul, South Korea
24%
60
69%
174
7%
17
Total number of days with different AQI categories in last 252 days in 2025 (113 days remaining)
Under WHO’s Safe Air Quality Limits: 24%
Health Risk Level:
Very high
In 2025, 24% of 252 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Dongdaemun Gu, Seoul, Seoul, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
75AQI
54AQI
60AQI
61AQI
73AQI
97AQI
59AQI
73AQI
45AQI
60AQI
63AQI
78AQI
97AQI
105AQI
58AQI
80AQI
85AQI
85AQI
93AQI
137AQI
146AQI
149AQI
117AQI
104AQI
66AQI
54AQI
72AQI
64AQI
66AQI
56AQI
76AQI
86AQI
76AQI
58AQI
53AQI
46AQI
55AQI
53AQI
49AQI
53AQI
60AQI
84AQI
81AQI
57AQI
103AQI
62AQI
122AQI
52AQI
69AQI
49AQI
57AQI
56AQI
62AQI
56AQI
60AQI
57AQI
69AQI
59AQI
91AQI
111AQI
82AQI
60AQI
48AQI
39AQI
76AQI
100AQI
87AQI
105AQI
119AQI
108AQI
98AQI
91AQI
79AQI
63AQI
75AQI
68AQI
72AQI
82AQI
94AQI
111AQI
117AQI
126AQI
124AQI
133AQI
95AQI
93AQI
62AQI
56AQI
50AQI
61AQI
83AQI
82AQI
77AQI
79AQI
59AQI
68AQI
76AQI
78AQI
75AQI
81AQI
90AQI
68AQI
62AQI
45AQI
59AQI
67AQI
71AQI
84AQI
51AQI
63AQI
56AQI
45AQI
40AQI
65AQI
63AQI
58AQI
47AQI
59AQI
70AQI
61AQI
63AQI
53AQI
49AQI
51AQI
51AQI
44AQI
56AQI
62AQI
50AQI
55AQI
76AQI
75AQI
76AQI
74AQI
70AQI
65AQI
49AQI
61AQI
62AQI
45AQI
49AQI
51AQI
62AQI
45AQI
54AQI
66AQI
81AQI
88AQI
81AQI
78AQI
86AQI
92AQI
97AQI
75AQI
57AQI
60AQI
59AQI
73AQI
61AQI
67AQI
55AQI
59AQI
66AQI
76AQI
62AQI
60AQI
73AQI
71AQI
73AQI
68AQI
47AQI
61AQI
70AQI
73AQI
57AQI
48AQI
54AQI
63AQI
66AQI
52AQI
49AQI
43AQI
42AQI
54AQI
55AQI
52AQI
57AQI
75AQI
68AQI
58AQI
50AQI
48AQI
46AQI
63AQI
48AQI
41AQI
51AQI
37AQI
40AQI
34AQI
39AQI
38AQI
39AQI
39AQI
51AQI
60AQI
50AQI
48AQI
65AQI
68AQI
62AQI
60AQI
58AQI
62AQI
62AQI
51AQI
51AQI
46AQI
48AQI
60AQI
56AQI
51AQI
58AQI
51AQI
41AQI
43AQI
42AQI
40AQI
42AQI
53AQI
46AQI
47AQI
48AQI
50AQI
51AQI
54AQI
50AQI
45AQI
51AQI
52AQI
47AQI
45AQI
50AQI
43AQI
49AQI
51AQI
38AQI
40AQI
42AQI
42AQI
45AQI
81AQI
66AQI
87AQI
66AQI
62AQI
65AQI
51AQI
50AQI
44AQI
No. of days
202565AQI
Highest AQI recorded in
March87AQI
Lowest AQI recorded in
September44AQI
202461AQI
Highest AQI recorded in
January73AQI
Lowest AQI recorded in
September43AQI
202366AQI
Highest AQI recorded in
March90AQI
Lowest AQI recorded in
September47AQI
202265AQI
Highest AQI recorded in
January87AQI
Lowest AQI recorded in
August29AQI
202166AQI
Highest AQI recorded in
March86AQI
Lowest AQI recorded in
September34AQI
202060AQI
Highest AQI recorded in
December86AQI
Lowest AQI recorded in
September43AQI
Most & Least Polluted Years Over the Last 6 Years
Dongdaemun Gu's annual 2025 AQI (65) shows an average percentage change of 2.7% (worsened AQI) compared to previous years: 2020 (60), 2021 (66), 2022 (65), 2023 (66), 2024 (61).