Dairakujimachi, 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
Dairakujimachi, Hachioji, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 41 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Sep - 20th Sep 2025
Dairakujimachi, Hachioji, Tokyo, Japan
5 AM19th Sep 2025
6 PM
4 AM20th Sep 2025
53AQI
14AQI
48AQI
30AQI
In the last 24 hours,
Dairakujimachi's AQI reached its highest point of 53 at 5 AM during the Day, while the lowest point, 14, was recorded at 10 AM during the Day between 19th Sep and 20th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Dairakujimachi, Hachioji, Tokyo, Japan
30°C26/35°C
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
--°C/°C
47AQI
41AQI
43AQI
42AQI
2025 Days Vs Air Quality
Dairakujimachi, Hachioji, Tokyo, Japan
85%
97
15%
17
Total number of days with different AQI categories in last 263 days in 2025 (102 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 263 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Dairakujimachi, Hachioji, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
19AQI
18AQI
18AQI
25AQI
21AQI
23AQI
33AQI
35AQI
40AQI
50AQI
37AQI
34AQI
29AQI
37AQI
33AQI
27AQI
27AQI
33AQI
38AQI
34AQI
36AQI
36AQI
28AQI
23AQI
21AQI
20AQI
18AQI
19AQI
23AQI
23AQI
28AQI
39AQI
43AQI
48AQI
48AQI
50AQI
53AQI
56AQI
71AQI
77AQI
77AQI
64AQI
53AQI
55AQI
54AQI
46AQI
42AQI
45AQI
41AQI
39AQI
37AQI
37AQI
38AQI
40AQI
45AQI
46AQI
45AQI
44AQI
41AQI
44AQI
45AQI
36AQI
39AQI
34AQI
41AQI
45AQI
58AQI
52AQI
50AQI
47AQI
48AQI
49AQI
43AQI
38AQI
36AQI
33AQI
37AQI
40AQI
40AQI
40AQI
43AQI
45AQI
47AQI
49AQI
49AQI
48AQI
56AQI
57AQI
57AQI
51AQI
49AQI
50AQI
55AQI
53AQI
45AQI
40AQI
38AQI
33AQI
31AQI
29AQI
30AQI
38AQI
40AQI
38AQI
32AQI
32AQI
32AQI
40AQI
41AQI
41AQI
48AQI
49AQI
41AQI
22AQI
30AQI
48AQI
46AQI
38AQI
No. of days
202540AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
May22AQI
Most & Least Polluted Years Over the Last 1 Years
Dairakujimachi's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .