Siheung Daero, Gwangmyeongni, Gyeonggi, 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
Siheung Daero, Gwangmyeongni, Gyeonggi, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (17th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 42 of Good air quality, showing improvement over 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Siheung Daero, Gwangmyeongni, Gyeonggi, South Korea
6 AM17th Sep 2025
7 PM
5 AM18th Sep 2025
53AQI
20AQI
49AQI
22AQI
In the last 24 hours,
Siheung Daero's AQI reached its highest point of 53 at 8 AM during the Day, while the lowest point, 20, was recorded at 4 PM during the Day between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Siheung Daero, Gwangmyeongni, Gyeonggi, South Korea
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
25°C22/28°C
25°C19/31°C
26°C20/32°C
24°C21/29°C
22°C20/26°C
24°C20/29°C
26°C21/31°C
24°C22/28°C
22°C19/24°C
--°C/°C
49AQI
42AQI
48AQI
45AQI
2025 Days Vs Air Quality
Siheung Daero, Gwangmyeongni, Gyeonggi, South Korea
27%
69
68%
176
6%
15
Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)
Under WHO’s Safe Air Quality Limits: 27%
Health Risk Level:
Very high
In 2025, 27% of 261 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
Siheung Daero, Gwangmyeongni, Gyeonggi, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
71AQI
54AQI
55AQI
57AQI
67AQI
100AQI
53AQI
73AQI
41AQI
54AQI
58AQI
74AQI
83AQI
98AQI
52AQI
74AQI
78AQI
76AQI
79AQI
132AQI
133AQI
147AQI
111AQI
108AQI
62AQI
58AQI
64AQI
60AQI
60AQI
51AQI
73AQI
82AQI
82AQI
56AQI
52AQI
41AQI
52AQI
46AQI
43AQI
47AQI
55AQI
73AQI
76AQI
52AQI
93AQI
58AQI
109AQI
49AQI
62AQI
47AQI
57AQI
54AQI
59AQI
54AQI
59AQI
51AQI
71AQI
55AQI
83AQI
107AQI
77AQI
57AQI
43AQI
37AQI
73AQI
98AQI
89AQI
108AQI
119AQI
113AQI
98AQI
96AQI
76AQI
58AQI
73AQI
65AQI
73AQI
80AQI
88AQI
101AQI
111AQI
115AQI
114AQI
128AQI
92AQI
93AQI
58AQI
50AQI
42AQI
58AQI
76AQI
80AQI
78AQI
78AQI
60AQI
64AQI
73AQI
77AQI
74AQI
79AQI
90AQI
67AQI
61AQI
45AQI
56AQI
65AQI
70AQI
85AQI
49AQI
65AQI
51AQI
45AQI
37AQI
65AQI
62AQI
54AQI
42AQI
60AQI
69AQI
58AQI
59AQI
51AQI
47AQI
49AQI
52AQI
40AQI
55AQI
60AQI
51AQI
56AQI
74AQI
75AQI
76AQI
73AQI
66AQI
57AQI
49AQI
57AQI
61AQI
37AQI
46AQI
51AQI
66AQI
48AQI
54AQI
68AQI
83AQI
92AQI
81AQI
84AQI
91AQI
91AQI
99AQI
77AQI
55AQI
56AQI
58AQI
69AQI
57AQI
63AQI
51AQI
56AQI
64AQI
75AQI
63AQI
58AQI
66AQI
69AQI
69AQI
66AQI
53AQI
59AQI
70AQI
73AQI
64AQI
57AQI
58AQI
64AQI
64AQI
53AQI
50AQI
45AQI
44AQI
50AQI
50AQI
48AQI
52AQI
65AQI
65AQI
58AQI
54AQI
51AQI
49AQI
59AQI
53AQI
46AQI
51AQI
41AQI
42AQI
33AQI
34AQI
37AQI
34AQI
39AQI
51AQI
64AQI
52AQI
48AQI
68AQI
71AQI
66AQI
66AQI
59AQI
61AQI
61AQI
51AQI
51AQI
47AQI
48AQI
57AQI
56AQI
53AQI
59AQI
52AQI
41AQI
43AQI
42AQI
39AQI
42AQI
52AQI
46AQI
47AQI
48AQI
49AQI
51AQI
54AQI
50AQI
44AQI
51AQI
52AQI
47AQI
45AQI
49AQI
41AQI
49AQI
52AQI
36AQI
41AQI
41AQI
42AQI
48AQI
53AQI
50AQI
51AQI
50AQI
43AQI
44AQI
49AQI
44AQI
42AQI
76AQI
61AQI
84AQI
65AQI
62AQI
64AQI
51AQI
50AQI
46AQI
No. of days
202563AQI
Highest AQI recorded in
March84AQI
Lowest AQI recorded in
September46AQI
202463AQI
Highest AQI recorded in
April75AQI
Lowest AQI recorded in
September47AQI
202364AQI
Highest AQI recorded in
March86AQI
Lowest AQI recorded in
September52AQI
202266AQI
Highest AQI recorded in
April78AQI
Lowest AQI recorded in
August42AQI
202172AQI
Highest AQI recorded in
March102AQI
Lowest AQI recorded in
September41AQI
202069AQI
Highest AQI recorded in
December86AQI
Lowest AQI recorded in
September50AQI
Most & Least Polluted Years Over the Last 6 Years
Siheung Daero's annual 2025 AQI (63) shows an average percentage change of -5.9% (improved AQI) compared to previous years: 2020 (69), 2021 (72), 2022 (66), 2023 (64), 2024 (63).