Cheonggyecheon, 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!
August Air Quality Analysis
Cheonggyecheon, Seoul, Seoul, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (24th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 52 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 24th Aug - 25th Aug 2025
Cheonggyecheon, Seoul, Seoul, South Korea
5 AM24th Aug 2025
7 PM
4 AM25th Aug 2025
79AQI
52AQI
64AQI
51AQI
In the last 24 hours,
Cheonggyecheon's AQI reached its highest point of 79 at 1 PM during the Day, while the lowest point, 51, was recorded at 1 AM during the Night between 24th Aug and 25th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Cheonggyecheon, Seoul, Seoul, South Korea
32°C27/38°C
32°C27/38°C
32°C27/37°C
32°C27/38°C
32°C27/37°C
31°C28/35°C
31°C27/36°C
31°C27/36°C
28°C25/31°C
28°C23/35°C
29°C25/33°C
27°C24/29°C
27°C23/32°C
27°C23/33°C
25°C23/27°C
27°C22/34°C
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
--°C/°C
62AQI
54AQI
55AQI
52AQI
2025 Days Vs Air Quality
Cheonggyecheon, Seoul, Seoul, South Korea
10%
23
81%
191
9%
21
0.4%
1
Total number of days with different AQI categories in last 237 days in 2025 (128 days remaining)
Under WHO’s Safe Air Quality Limits: 10%
Health Risk Level:
Extreme
In 2025, 10% of 237 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Cheonggyecheon, Seoul, Seoul, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
78AQI
61AQI
64AQI
66AQI
76AQI
102AQI
64AQI
79AQI
53AQI
65AQI
68AQI
82AQI
104AQI
109AQI
62AQI
83AQI
90AQI
90AQI
94AQI
139AQI
148AQI
152AQI
121AQI
109AQI
69AQI
58AQI
69AQI
66AQI
66AQI
59AQI
76AQI
85AQI
77AQI
59AQI
56AQI
51AQI
59AQI
52AQI
53AQI
55AQI
62AQI
89AQI
82AQI
61AQI
103AQI
64AQI
120AQI
55AQI
69AQI
51AQI
59AQI
58AQI
64AQI
58AQI
64AQI
60AQI
73AQI
61AQI
90AQI
114AQI
84AQI
62AQI
48AQI
40AQI
78AQI
103AQI
91AQI
108AQI
126AQI
113AQI
102AQI
95AQI
81AQI
65AQI
77AQI
70AQI
74AQI
84AQI
96AQI
111AQI
118AQI
126AQI
121AQI
134AQI
97AQI
96AQI
67AQI
63AQI
53AQI
65AQI
86AQI
86AQI
80AQI
81AQI
61AQI
69AQI
76AQI
77AQI
77AQI
82AQI
94AQI
72AQI
65AQI
51AQI
61AQI
68AQI
74AQI
87AQI
53AQI
65AQI
58AQI
47AQI
44AQI
69AQI
66AQI
59AQI
49AQI
61AQI
72AQI
64AQI
67AQI
54AQI
52AQI
53AQI
52AQI
44AQI
57AQI
64AQI
54AQI
59AQI
77AQI
78AQI
78AQI
76AQI
73AQI
70AQI
55AQI
62AQI
64AQI
50AQI
53AQI
55AQI
65AQI
49AQI
55AQI
70AQI
85AQI
94AQI
84AQI
84AQI
91AQI
95AQI
102AQI
78AQI
62AQI
62AQI
62AQI
73AQI
62AQI
69AQI
58AQI
59AQI
66AQI
76AQI
66AQI
65AQI
70AQI
71AQI
72AQI
69AQI
59AQI
63AQI
70AQI
72AQI
63AQI
58AQI
59AQI
63AQI
65AQI
55AQI
52AQI
49AQI
47AQI
52AQI
53AQI
52AQI
55AQI
66AQI
63AQI
57AQI
54AQI
52AQI
50AQI
60AQI
53AQI
47AQI
54AQI
43AQI
45AQI
36AQI
40AQI
40AQI
40AQI
41AQI
53AQI
63AQI
52AQI
50AQI
68AQI
71AQI
65AQI
63AQI
58AQI
66AQI
64AQI
57AQI
58AQI
53AQI
52AQI
61AQI
57AQI
52AQI
59AQI
53AQI
51AQI
51AQI
50AQI
48AQI
49AQI
56AQI
51AQI
51AQI
52AQI
55AQI
52AQI
52AQI
85AQI
68AQI
89AQI
68AQI
65AQI
67AQI
53AQI
55AQI
No. of days
202569AQI
Highest AQI recorded in
March89AQI
Lowest AQI recorded in
July53AQI
202460AQI
Highest AQI recorded in
January72AQI
Lowest AQI recorded in
September40AQI
202368AQI
Highest AQI recorded in
March95AQI
Lowest AQI recorded in
September48AQI
202266AQI
Highest AQI recorded in
February87AQI
Lowest AQI recorded in
August27AQI
202171AQI
Highest AQI recorded in
March99AQI
Lowest AQI recorded in
September34AQI
202078AQI
Highest AQI recorded in
November96AQI
Lowest AQI recorded in
September57AQI
Most & Least Polluted Years Over the Last 6 Years
Cheonggyecheon's annual 2025 AQI (69) shows an average percentage change of 1.5% (worsened AQI) compared to previous years: 2020 (78), 2021 (71), 2022 (66), 2023 (68), 2024 (60).