Yagicho, Hachioji, Tokyo, Japan 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
Yagicho, Hachioji, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (20th 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 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Yagicho, Hachioji, Tokyo, Japan
5 AM20th Sep 2025
6 PM
4 AM21st Sep 2025
45AQI
21AQI
46AQI
37AQI
In the last 24 hours,
Yagicho's AQI reached its highest point of 46 at 3 AM during the Night, while the lowest point, 21, was recorded at 12 PM during the Day between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Yagicho, Hachioji, Tokyo, Japan
29°C25/34°C
31°C26/36°C
31°C27/36°C
30°C27/35°C
30°C26/33°C
30°C26/36°C
28°C25/31°C
28°C24/33°C
31°C26/36°C
31°C28/35°C
30°C26/36°C
31°C26/36°C
29°C26/35°C
25°C25/25°C
23°C22/24°C
25°C22/30°C
27°C23/32°C
29°C25/34°C
28°C26/32°C
28°C25/31°C
26°C23/29°C
24°C23/25°C
26°C23/29°C
28°C25/32°C
27°C25/31°C
28°C25/31°C
29°C25/34°C
29°C23/36°C
21°C20/22°C
22°C21/23°C
--°C/°C
48AQI
43AQI
44AQI
42AQI
2025 Days Vs Air Quality
Yagicho, Hachioji, Tokyo, Japan
92%
242
8%
21
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 264 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Yagicho, Hachioji, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
26AQI
23AQI
24AQI
22AQI
28AQI
27AQI
29AQI
26AQI
24AQI
24AQI
25AQI
26AQI
24AQI
29AQI
22AQI
26AQI
24AQI
27AQI
26AQI
30AQI
29AQI
30AQI
33AQI
32AQI
30AQI
23AQI
28AQI
27AQI
25AQI
25AQI
27AQI
28AQI
24AQI
32AQI
27AQI
27AQI
28AQI
27AQI
28AQI
26AQI
28AQI
26AQI
30AQI
26AQI
26AQI
30AQI
33AQI
29AQI
28AQI
28AQI
29AQI
27AQI
30AQI
30AQI
31AQI
32AQI
35AQI
37AQI
42AQI
41AQI
33AQI
30AQI
24AQI
27AQI
30AQI
30AQI
34AQI
32AQI
32AQI
30AQI
36AQI
24AQI
21AQI
18AQI
16AQI
15AQI
15AQI
17AQI
21AQI
25AQI
27AQI
30AQI
48AQI
57AQI
55AQI
36AQI
29AQI
32AQI
27AQI
22AQI
21AQI
21AQI
19AQI
19AQI
14AQI
15AQI
20AQI
17AQI
22AQI
21AQI
20AQI
18AQI
20AQI
19AQI
18AQI
25AQI
28AQI
31AQI
28AQI
24AQI
21AQI
16AQI
15AQI
17AQI
19AQI
19AQI
20AQI
15AQI
19AQI
18AQI
16AQI
17AQI
24AQI
20AQI
18AQI
15AQI
18AQI
18AQI
15AQI
16AQI
17AQI
18AQI
22AQI
20AQI
23AQI
21AQI
25AQI
27AQI
39AQI
44AQI
32AQI
34AQI
29AQI
22AQI
23AQI
20AQI
20AQI
20AQI
17AQI
16AQI
15AQI
19AQI
17AQI
19AQI
21AQI
23AQI
25AQI
32AQI
25AQI
20AQI
18AQI
23AQI
22AQI
18AQI
18AQI
19AQI
26AQI
23AQI
24AQI
22AQI
20AQI
12AQI
13AQI
14AQI
15AQI
16AQI
19AQI
17AQI
19AQI
31AQI
35AQI
40AQI
48AQI
47AQI
50AQI
56AQI
71AQI
75AQI
75AQI
65AQI
54AQI
56AQI
55AQI
47AQI
45AQI
49AQI
46AQI
41AQI
38AQI
37AQI
39AQI
40AQI
44AQI
44AQI
44AQI
43AQI
41AQI
44AQI
44AQI
35AQI
38AQI
33AQI
42AQI
46AQI
59AQI
54AQI
51AQI
49AQI
50AQI
50AQI
43AQI
39AQI
37AQI
36AQI
37AQI
39AQI
42AQI
43AQI
47AQI
47AQI
47AQI
50AQI
50AQI
49AQI
56AQI
58AQI
56AQI
52AQI
50AQI
51AQI
56AQI
55AQI
47AQI
41AQI
40AQI
36AQI
33AQI
34AQI
33AQI
41AQI
45AQI
44AQI
38AQI
33AQI
33AQI
41AQI
41AQI
42AQI
51AQI
48AQI
38AQI
42AQI
26AQI
29AQI
30AQI
20AQI
22AQI
20AQI
48AQI
48AQI
40AQI
No. of days
202531AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
April20AQI
202428AQI
Highest AQI recorded in
June37AQI
Lowest AQI recorded in
January21AQI
202327AQI
Highest AQI recorded in
April37AQI
Lowest AQI recorded in
December20AQI
202228AQI
Highest AQI recorded in
April38AQI
Lowest AQI recorded in
January14AQI
202121AQI
Highest AQI recorded in
June34AQI
Lowest AQI recorded in
February11AQI
202016AQI
Highest AQI recorded in
August27AQI
Lowest AQI recorded in
April10AQI
Most & Least Polluted Years Over the Last 6 Years
Yagicho's annual 2025 AQI (31) shows an average percentage change of 35.6% (worsened AQI) compared to previous years: 2020 (16), 2021 (21), 2022 (28), 2023 (27), 2024 (28).