Nishitokyo, 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
Nishitokyo, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 39 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Nishitokyo, Tokyo, Japan
5 AM17th Sep 2025
6 PM
4 AM18th Sep 2025
AQI
AQI
61AQI
35AQI
In the last 24 hours,
Nishitokyo's AQI reached its highest point of 61 at 2 PM during the Night, while the lowest point, 35, was recorded at 2 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Nishitokyo, Tokyo, Japan
31°C27/36°C
32°C29/36°C
32°C29/37°C
31°C28/36°C
32°C29/36°C
33°C30/38°C
32°C29/37°C
31°C29/34°C
32°C29/36°C
29°C28/32°C
30°C27/34°C
32°C29/37°C
33°C30/37°C
32°C29/36°C
33°C29/37°C
32°C29/36°C
27°C27/28°C
25°C23/26°C
27°C24/32°C
29°C26/33°C
31°C27/36°C
30°C28/33°C
30°C28/32°C
27°C24/30°C
25°C24/27°C
27°C24/31°C
29°C26/33°C
29°C26/32°C
29°C28/33°C
--°C/°C
--°C/°C
46AQI
42AQI
45AQI
39AQI
2025 Days Vs Air Quality
Nishitokyo, Tokyo, Japan
86%
96
14%
15
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 260 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
Nishitokyo, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
19AQI
14AQI
19AQI
25AQI
23AQI
20AQI
32AQI
32AQI
36AQI
46AQI
33AQI
29AQI
26AQI
32AQI
31AQI
24AQI
25AQI
28AQI
34AQI
29AQI
30AQI
31AQI
25AQI
19AQI
17AQI
16AQI
15AQI
16AQI
21AQI
20AQI
24AQI
33AQI
38AQI
44AQI
41AQI
44AQI
46AQI
54AQI
69AQI
75AQI
79AQI
63AQI
55AQI
56AQI
55AQI
47AQI
45AQI
44AQI
43AQI
39AQI
36AQI
35AQI
37AQI
38AQI
41AQI
41AQI
39AQI
38AQI
34AQI
39AQI
38AQI
33AQI
34AQI
33AQI
40AQI
44AQI
58AQI
53AQI
50AQI
47AQI
46AQI
48AQI
40AQI
39AQI
35AQI
34AQI
34AQI
33AQI
36AQI
39AQI
40AQI
44AQI
45AQI
48AQI
49AQI
47AQI
56AQI
56AQI
55AQI
50AQI
47AQI
50AQI
54AQI
52AQI
45AQI
38AQI
37AQI
36AQI
29AQI
28AQI
30AQI
36AQI
40AQI
37AQI
30AQI
31AQI
28AQI
36AQI
38AQI
39AQI
20AQI
26AQI
46AQI
45AQI
35AQI
No. of days
202538AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
May20AQI
Most & Least Polluted Years Over the Last 1 Years
Nishitokyo's annual 2025 AQI (38) shows an average percentage change of NaN% (improved AQI) compared to previous years: .