4 chome, Nagoya, Aichi, 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
4 chome, Nagoya, Aichi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (23rd September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 35 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 23rd Sep - 24th Sep 2025
4 chome, Nagoya, Aichi, Japan
5 AM23rd Sep 2025
6 PM
4 AM24th Sep 2025
44AQI
34AQI
34AQI
30AQI
In the last 24 hours,
4 chome's AQI reached its highest point of 44 at 10 AM during the Day, while the lowest point, 30, was recorded at 7 PM during the Night between 23rd Sep and 24th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
4 chome, Nagoya, Aichi, Japan
30°C27/34°C
29°C26/33°C
29°C26/34°C
29°C26/34°C
30°C26/34°C
32°C27/37°C
31°C27/37°C
31°C28/35°C
31°C27/36°C
30°C26/35°C
26°C24/27°C
25°C23/28°C
27°C23/32°C
28°C25/33°C
30°C26/35°C
30°C27/34°C
28°C25/32°C
26°C23/30°C
25°C24/28°C
26°C24/29°C
27°C25/30°C
29°C25/34°C
29°C25/33°C
29°C26/34°C
28°C25/32°C
25°C23/29°C
23°C23/24°C
25°C22/30°C
23°C19/27°C
23°C21/26°C
--°C/°C
41AQI
37AQI
41AQI
38AQI
2025 Days Vs Air Quality
4 chome, Nagoya, Aichi, Japan
81%
96
19%
22
Total number of days with different AQI categories in last 267 days in 2025 (98 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2025, 81% of 267 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
4 chome, Nagoya, Aichi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
22AQI
17AQI
21AQI
32AQI
22AQI
27AQI
24AQI
32AQI
42AQI
44AQI
32AQI
25AQI
23AQI
26AQI
31AQI
23AQI
23AQI
29AQI
27AQI
32AQI
39AQI
43AQI
35AQI
28AQI
23AQI
20AQI
21AQI
19AQI
26AQI
23AQI
30AQI
43AQI
51AQI
70AQI
65AQI
65AQI
72AQI
64AQI
66AQI
70AQI
83AQI
66AQI
56AQI
54AQI
53AQI
45AQI
49AQI
48AQI
42AQI
39AQI
38AQI
36AQI
36AQI
34AQI
35AQI
33AQI
28AQI
26AQI
26AQI
29AQI
34AQI
35AQI
38AQI
42AQI
41AQI
46AQI
60AQI
50AQI
51AQI
47AQI
42AQI
49AQI
43AQI
39AQI
35AQI
34AQI
41AQI
39AQI
41AQI
40AQI
43AQI
46AQI
46AQI
48AQI
48AQI
48AQI
57AQI
57AQI
57AQI
52AQI
48AQI
53AQI
55AQI
53AQI
45AQI
36AQI
39AQI
27AQI
30AQI
26AQI
31AQI
38AQI
38AQI
37AQI
30AQI
30AQI
29AQI
36AQI
35AQI
42AQI
50AQI
43AQI
37AQI
39AQI
31AQI
32AQI
35AQI
23AQI
29AQI
48AQI
47AQI
35AQI
No. of days
202540AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
May23AQI
Most & Least Polluted Years Over the Last 1 Years
4 chome's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .