Chechon, Chungbuk, 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
Chechon, Chungbuk, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 34 of Good air quality, showing improvement over 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Chechon, Chungbuk, South Korea
6 AM20th Sep 2025
6 PM
5 AM21st Sep 2025
AQI
AQI
37AQI
14AQI
In the last 24 hours,
Chechon's AQI reached its highest point of 37 at 7 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Chechon, Chungbuk, South Korea
25°C18/33°C
27°C21/34°C
26°C20/33°C
25°C20/32°C
23°C19/27°C
23°C17/31°C
23°C17/31°C
23°C19/29°C
24°C19/30°C
23°C18/30°C
23°C18/29°C
22°C19/29°C
22°C15/31°C
19°C16/23°C
22°C16/31°C
22°C17/27°C
22°C19/29°C
21°C14/30°C
20°C17/24°C
19°C14/28°C
18°C11/28°C
18°C13/25°C
18°C16/20°C
19°C15/25°C
20°C14/29°C
21°C15/29°C
19°C17/23°C
16°C14/19°C
15°C11/18°C
--°C/°C
--°C/°C
47AQI
41AQI
47AQI
42AQI
2025 Days Vs Air Quality
Chechon, Chungbuk, South Korea
30%
79
67%
176
3%
7
Total number of days with different AQI categories in last 263 days in 2025 (102 days remaining)
Under WHO’s Safe Air Quality Limits: 30%
Health Risk Level:
High
In 2025, 30% of 263 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
Annual Air Quality Insights
Chechon, Chungbuk, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
70AQI
72AQI
56AQI
61AQI
69AQI
98AQI
61AQI
70AQI
42AQI
59AQI
61AQI
76AQI
91AQI
98AQI
61AQI
70AQI
81AQI
92AQI
82AQI
101AQI
131AQI
131AQI
112AQI
95AQI
66AQI
53AQI
63AQI
55AQI
61AQI
57AQI
81AQI
77AQI
76AQI
60AQI
51AQI
47AQI
48AQI
53AQI
50AQI
58AQI
60AQI
76AQI
79AQI
52AQI
79AQI
57AQI
102AQI
52AQI
62AQI
50AQI
56AQI
54AQI
56AQI
57AQI
59AQI
58AQI
82AQI
59AQI
73AQI
80AQI
71AQI
51AQI
46AQI
41AQI
50AQI
62AQI
65AQI
77AQI
78AQI
88AQI
83AQI
75AQI
65AQI
48AQI
58AQI
60AQI
55AQI
73AQI
74AQI
86AQI
83AQI
89AQI
91AQI
114AQI
92AQI
114AQI
87AQI
62AQI
56AQI
62AQI
63AQI
64AQI
73AQI
70AQI
69AQI
64AQI
66AQI
79AQI
70AQI
73AQI
68AQI
58AQI
55AQI
54AQI
54AQI
63AQI
65AQI
76AQI
62AQI
56AQI
50AQI
46AQI
33AQI
55AQI
67AQI
55AQI
49AQI
51AQI
62AQI
58AQI
54AQI
54AQI
50AQI
51AQI
51AQI
45AQI
54AQI
69AQI
53AQI
41AQI
61AQI
65AQI
71AQI
69AQI
64AQI
54AQI
48AQI
57AQI
60AQI
57AQI
57AQI
57AQI
64AQI
46AQI
52AQI
57AQI
63AQI
75AQI
68AQI
56AQI
58AQI
62AQI
78AQI
68AQI
52AQI
55AQI
59AQI
64AQI
63AQI
66AQI
64AQI
56AQI
58AQI
62AQI
55AQI
57AQI
56AQI
63AQI
65AQI
66AQI
56AQI
46AQI
46AQI
57AQI
53AQI
46AQI
49AQI
59AQI
61AQI
55AQI
47AQI
46AQI
44AQI
52AQI
55AQI
53AQI
56AQI
62AQI
65AQI
58AQI
53AQI
49AQI
49AQI
53AQI
46AQI
40AQI
51AQI
42AQI
44AQI
35AQI
40AQI
45AQI
37AQI
44AQI
51AQI
51AQI
42AQI
39AQI
47AQI
52AQI
49AQI
50AQI
55AQI
59AQI
61AQI
54AQI
52AQI
45AQI
49AQI
53AQI
53AQI
47AQI
53AQI
45AQI
42AQI
43AQI
48AQI
47AQI
43AQI
51AQI
48AQI
46AQI
48AQI
50AQI
50AQI
52AQI
52AQI
45AQI
46AQI
50AQI
47AQI
47AQI
50AQI
40AQI
47AQI
45AQI
36AQI
35AQI
40AQI
40AQI
46AQI
49AQI
47AQI
48AQI
46AQI
45AQI
46AQI
51AQI
46AQI
37AQI
31AQI
34AQI
77AQI
62AQI
72AQI
61AQI
57AQI
58AQI
48AQI
49AQI
43AQI
No. of days
202559AQI
Highest AQI recorded in
January77AQI
Lowest AQI recorded in
September43AQI
202454AQI
Highest AQI recorded in
January75AQI
Lowest AQI recorded in
September33AQI
202362AQI
Highest AQI recorded in
February84AQI
Lowest AQI recorded in
September43AQI
202263AQI
Highest AQI recorded in
January82AQI
Lowest AQI recorded in
August28AQI
202158AQI
Highest AQI recorded in
March74AQI
Lowest AQI recorded in
September34AQI
202057AQI
Highest AQI recorded in
December78AQI
Lowest AQI recorded in
July39AQI
Most & Least Polluted Years Over the Last 6 Years
Chechon's annual 2025 AQI (59) shows an average percentage change of 1.04% (worsened AQI) compared to previous years: 2020 (57), 2021 (58), 2022 (63), 2023 (62), 2024 (54).