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!
October Air Quality Analysis
4 chome, Nagoya, Aichi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (7th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Oct - 8th Oct 2025
4 chome, Nagoya, Aichi, Japan
5 AM7th Oct 2025
5 PM
4 AM8th Oct 2025
AQI
AQI
55AQI
30AQI
In the last 24 hours,
4 chome's AQI reached its highest point of 55 at 11 PM during the Night, while the lowest point, undefined, was recorded at 7 PM during the Night between 7th Oct and 8th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
4 chome, Nagoya, Aichi, Japan
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
24°C21/27°C
25°C23/28°C
27°C23/32°C
25°C21/30°C
25°C22/28°C
24°C22/28°C
23°C20/27°C
23°C20/26°C
23°C18/27°C
23°C21/25°C
21°C20/22°C
22°C20/24°C
24°C20/30°C
24°C23/26°C
--°C/°C
40AQI
37AQI
39AQI
33AQI
2025 Days Vs Air Quality
4 chome, Nagoya, Aichi, Japan
80%
106
20%
26
Total number of days with different AQI categories in last 281 days in 2025 (84 days remaining)
Under WHO’s Safe Air Quality Limits: 80%
Health Risk Level:
Low
In 2025, 80% of 281 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
34AQI
33AQI
24AQI
24AQI
34AQI
27AQI
30AQI
37AQI
35AQI
59AQI
66AQI
55AQI
52AQI
50AQI
23AQI
29AQI
48AQI
47AQI
34AQI
51AQI
No. of days
202540AQI
Highest AQI recorded in
October51AQI
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: .