Koyo, Nagoya, Aichi, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Koyo, Nagoya, Aichi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (8th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 24 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 7th Aug - 8th Aug 2026
Koyo, Nagoya, Aichi, Japan
4 AM7th Aug 2026
7 PM
3 AM8th Aug 2026
30AQI
21AQI
29AQI
21AQI
In the last 24 hours,
Koyo's AQI reached its highest point of 30 at 1 PM during the Day, while the lowest point, 21, was recorded at 12 AM during the Night between 7th Aug and 8th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Koyo, Nagoya, Aichi, Japan
27°C23/31°C
27°C23/31°C
28°C25/31°C
28°C26/32°C
30°C25/36°C
31°C26/36°C
32°C28/36°C
30°C27/33°C
29°C27/31°C
29°C27/33°C
31°C27/36°C
32°C28/38°C
33°C29/38°C
33°C28/39°C
33°C28/38°C
33°C28/38°C
31°C28/36°C
31°C27/37°C
28°C25/32°C
29°C25/34°C
31°C27/37°C
31°C27/37°C
31°C27/37°C
32°C27/38°C
29°C27/32°C
28°C25/31°C
29°C25/34°C
30°C27/36°C
30°C27/34°C
30°C27/34°C
42AQI
36AQI
36AQI
32AQI
2026 Days Vs Air Quality
Koyo, Nagoya, Aichi, Japan
81%
178
19%
42
Total number of days with different AQI categories in last 220 days in 2026 (145 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2026, 81% of 220 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
Koyo, Nagoya, Aichi, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
14AQI (US)
12AQI (US)
14AQI (US)
25AQI (US)
50AQI (US)
18AQI (US)
33AQI (US)
37AQI (US)
17AQI (US)
47AQI (US)
36AQI (US)
16AQI (US)
45AQI (US)
24AQI (US)
44AQI (US)
62AQI (US)
63AQI (US)
58AQI (US)
70AQI (US)
26AQI (US)
10AQI (US)
20AQI (US)
36AQI (US)
44AQI (US)
42AQI (US)
22AQI (US)
36AQI (US)
30AQI (US)
23AQI (US)
38AQI (US)
35AQI (US)
35AQI (US)
46AQI (US)
30AQI (US)
38AQI (US)
60AQI (US)
58AQI (US)
15AQI (US)
15AQI (US)
34AQI (US)
45AQI (US)
34AQI (US)
53AQI (US)
55AQI (US)
65AQI (US)
66AQI (US)
54AQI (US)
22AQI (US)
24AQI (US)
29AQI (US)
37AQI (US)
56AQI (US)
43AQI (US)
52AQI (US)
55AQI (US)
43AQI (US)
21AQI (US)
46AQI (US)
28AQI (US)
24AQI (US)
58AQI (US)
39AQI (US)
9AQI (US)
41AQI (US)
53AQI (US)
41AQI (US)
34AQI (US)
40AQI (US)
57AQI (US)
52AQI (US)
57AQI (US)
36AQI (US)
43AQI (US)
56AQI (US)
46AQI (US)
45AQI (US)
64AQI (US)
30AQI (US)
42AQI (US)
41AQI (US)
57AQI (US)
51AQI (US)
46AQI (US)
52AQI (US)
15AQI (US)
27AQI (US)
60AQI (US)
56AQI (US)
60AQI (US)
22AQI (US)
18AQI (US)
40AQI (US)
49AQI (US)
42AQI (US)
26AQI (US)
43AQI (US)
41AQI (US)
28AQI (US)
31AQI (US)
46AQI (US)
38AQI (US)
32AQI (US)
42AQI (US)
55AQI (US)
34AQI (US)
24AQI (US)
36AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
37AQI (US)
47AQI (US)
38AQI (US)
20AQI (US)
42AQI (US)
49AQI (US)
49AQI (US)
46AQI (US)
39AQI (US)
34AQI (US)
47AQI (US)
50AQI (US)
55AQI (US)
28AQI (US)
21AQI (US)
23AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
31AQI (US)
39AQI (US)
31AQI (US)
44AQI (US)
84AQI (US)
67AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
60AQI (US)
60AQI (US)
55AQI (US)
59AQI (US)
48AQI (US)
39AQI (US)
24AQI (US)
26AQI (US)
23AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
24AQI (US)
21AQI (US)
20AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
36AQI (US)
44AQI (US)
38AQI (US)
22AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
28AQI (US)
19AQI (US)
19AQI (US)
18AQI (US)
21AQI (US)
22AQI (US)
27AQI (US)
29AQI (US)
21AQI (US)
30AQI (US)
51AQI (US)
62AQI (US)
49AQI (US)
22AQI (US)
18AQI (US)
24AQI (US)
21AQI (US)
22AQI (US)
26AQI (US)
26AQI (US)
25AQI (US)
27AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
27AQI (US)
42AQI (US)
49AQI (US)
51AQI (US)
45AQI (US)
23AQI (US)
33AQI (US)
60AQI (US)
69AQI (US)
45AQI (US)
32AQI (US)
41AQI (US)
38AQI (US)
31AQI (US)
34AQI (US)
27AQI (US)
48AQI (US)
37AQI (US)
33AQI (US)
47AQI (US)
43AQI (US)
32AQI (US)
35AQI (US)
28AQI (US)
23AQI (US)
24AQI (US)
34AQI (US)
41AQI (US)
44AQI (US)
37AQI (US)
41AQI (US)
27AQI (US)
34AQI (US)
33AQI (US)
No. of days
202637AQI (US)
Highest AQI (US) recorded in
March44AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
202535AQI (US)
Highest AQI (US) recorded in
July49AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
April47AQI (US)
Lowest AQI (US) recorded in
December25AQI (US)
202337AQI (US)
Highest AQI (US) recorded in
April46AQI (US)
Lowest AQI (US) recorded in
August25AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
March48AQI (US)
Lowest AQI (US) recorded in
July24AQI (US)
202128AQI (US)
Highest AQI (US) recorded in
November40AQI (US)
Lowest AQI (US) recorded in
January13AQI (US)
202016AQI (US)
Highest AQI (US) recorded in
August20AQI (US)
Lowest AQI (US) recorded in
December12AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Koyo's annual 2026 AQI (US) (37) shows an average percentage change of 32.2% (worsened AQI (US)) compared to previous years: 2020 (16), 2021 (28), 2022 (33), 2023 (37), 2024 (33), 2025 (35).