Kasugai, 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
Kasugai, Aichi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 45 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Kasugai, Aichi, Japan
5 AM18th Sep 2025
6 PM
4 AM19th Sep 2025
66AQI
18AQI
47AQI
15AQI
In the last 24 hours,
Kasugai's AQI reached its highest point of 66 at 11 AM during the Day, while the lowest point, 15, was recorded at 7 PM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Kasugai, Aichi, Japan
31°C26/36°C
31°C26/37°C
31°C27/36°C
30°C27/33°C
31°C27/36°C
29°C26/34°C
29°C26/34°C
29°C25/34°C
29°C25/34°C
30°C26/35°C
32°C27/38°C
32°C27/37°C
31°C28/36°C
31°C27/36°C
30°C26/36°C
26°C24/27°C
25°C23/28°C
27°C23/32°C
28°C24/33°C
30°C25/35°C
30°C26/35°C
28°C25/33°C
26°C23/30°C
25°C24/28°C
26°C24/28°C
27°C24/30°C
29°C25/34°C
29°C25/33°C
29°C25/34°C
27°C24/32°C
--°C/°C
48AQI
41AQI
42AQI
39AQI
2025 Days Vs Air Quality
Kasugai, Aichi, Japan
91%
237
9%
24
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 262 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Kasugai, Aichi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
25AQI
26AQI
26AQI
25AQI
23AQI
26AQI
26AQI
26AQI
21AQI
23AQI
24AQI
24AQI
29AQI
28AQI
24AQI
26AQI
25AQI
26AQI
26AQI
32AQI
31AQI
36AQI
36AQI
35AQI
31AQI
25AQI
29AQI
29AQI
28AQI
31AQI
36AQI
25AQI
29AQI
29AQI
29AQI
30AQI
29AQI
28AQI
27AQI
28AQI
29AQI
25AQI
30AQI
27AQI
29AQI
30AQI
32AQI
29AQI
29AQI
28AQI
29AQI
29AQI
31AQI
31AQI
31AQI
35AQI
38AQI
37AQI
38AQI
36AQI
32AQI
24AQI
22AQI
31AQI
30AQI
30AQI
34AQI
34AQI
29AQI
27AQI
34AQI
21AQI
20AQI
16AQI
16AQI
16AQI
14AQI
18AQI
29AQI
27AQI
34AQI
32AQI
41AQI
47AQI
41AQI
29AQI
25AQI
22AQI
23AQI
19AQI
19AQI
16AQI
16AQI
17AQI
14AQI
16AQI
17AQI
17AQI
20AQI
21AQI
21AQI
17AQI
21AQI
18AQI
19AQI
21AQI
25AQI
25AQI
22AQI
18AQI
17AQI
14AQI
13AQI
18AQI
18AQI
18AQI
19AQI
18AQI
20AQI
18AQI
17AQI
18AQI
18AQI
18AQI
15AQI
15AQI
17AQI
16AQI
15AQI
15AQI
19AQI
21AQI
22AQI
22AQI
21AQI
18AQI
22AQI
24AQI
32AQI
29AQI
23AQI
22AQI
22AQI
17AQI
17AQI
18AQI
16AQI
18AQI
16AQI
16AQI
15AQI
19AQI
16AQI
17AQI
19AQI
20AQI
24AQI
27AQI
22AQI
18AQI
16AQI
20AQI
19AQI
18AQI
17AQI
18AQI
19AQI
22AQI
24AQI
26AQI
23AQI
17AQI
16AQI
17AQI
18AQI
17AQI
21AQI
20AQI
20AQI
37AQI
47AQI
80AQI
85AQI
72AQI
75AQI
62AQI
68AQI
75AQI
84AQI
64AQI
52AQI
52AQI
52AQI
42AQI
48AQI
45AQI
38AQI
35AQI
33AQI
33AQI
35AQI
34AQI
36AQI
36AQI
28AQI
25AQI
26AQI
32AQI
37AQI
39AQI
39AQI
43AQI
45AQI
48AQI
64AQI
53AQI
52AQI
45AQI
39AQI
48AQI
38AQI
35AQI
36AQI
35AQI
40AQI
41AQI
43AQI
42AQI
45AQI
49AQI
47AQI
51AQI
50AQI
51AQI
59AQI
58AQI
56AQI
52AQI
50AQI
55AQI
56AQI
54AQI
44AQI
38AQI
39AQI
27AQI
24AQI
28AQI
33AQI
39AQI
40AQI
37AQI
30AQI
31AQI
28AQI
38AQI
33AQI
44AQI
50AQI
45AQI
27AQI
30AQI
28AQI
18AQI
19AQI
20AQI
49AQI
48AQI
36AQI
No. of days
202530AQI
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
April18AQI
202434AQI
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
December25AQI
202335AQI
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
August25AQI
202234AQI
Highest AQI recorded in
May44AQI
Lowest AQI recorded in
August16AQI
202130AQI
Highest AQI recorded in
June43AQI
Lowest AQI recorded in
April22AQI
202024AQI
Highest AQI recorded in
August34AQI
Lowest AQI recorded in
September16AQI
Most & Least Polluted Years Over the Last 6 Years
Kasugai's annual 2025 AQI (30) shows an average percentage change of -1.05% (improved AQI) compared to previous years: 2020 (24), 2021 (30), 2022 (34), 2023 (35), 2024 (34).