Yamatocho, Kawaguchi, Saitama, 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
Yamatocho, Kawaguchi, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (27th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Sep - 28th Sep 2025
Yamatocho, Kawaguchi, Saitama, Japan
5 AM27th Sep 2025
5 PM
4 AM28th Sep 2025
44AQI
23AQI
37AQI
29AQI
In the last 24 hours,
Yamatocho's AQI reached its highest point of 44 at 2 PM during the Day, while the lowest point, 23, was recorded at 7 AM during the Day between 27th Sep and 28th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Yamatocho, Kawaguchi, Saitama, Japan
30°C27/34°C
33°C28/38°C
33°C30/37°C
31°C28/35°C
32°C30/36°C
32°C30/36°C
28°C27/29°C
26°C24/26°C
28°C24/32°C
29°C26/33°C
31°C27/36°C
30°C28/33°C
29°C28/31°C
27°C24/29°C
25°C24/28°C
27°C24/31°C
30°C27/33°C
29°C27/32°C
30°C27/33°C
31°C28/35°C
30°C24/37°C
23°C22/23°C
25°C23/27°C
26°C22/31°C
24°C22/27°C
24°C21/27°C
24°C21/28°C
25°C23/29°C
27°C25/31°C
25°C24/28°C
--°C/°C
42AQI
35AQI
39AQI
37AQI
2025 Days Vs Air Quality
Yamatocho, Kawaguchi, Saitama, Japan
92%
248
8%
22
Total number of days with different AQI categories in last 271 days in 2025 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 271 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
Yamatocho, Kawaguchi, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
25AQI
23AQI
26AQI
23AQI
29AQI
24AQI
27AQI
25AQI
25AQI
24AQI
28AQI
29AQI
28AQI
30AQI
23AQI
29AQI
27AQI
32AQI
33AQI
33AQI
34AQI
35AQI
36AQI
35AQI
33AQI
27AQI
31AQI
28AQI
30AQI
29AQI
30AQI
30AQI
28AQI
30AQI
29AQI
27AQI
27AQI
29AQI
29AQI
26AQI
30AQI
28AQI
31AQI
28AQI
30AQI
33AQI
34AQI
30AQI
30AQI
30AQI
29AQI
31AQI
31AQI
32AQI
32AQI
34AQI
37AQI
42AQI
45AQI
49AQI
35AQI
33AQI
24AQI
31AQI
31AQI
33AQI
34AQI
34AQI
32AQI
38AQI
36AQI
29AQI
26AQI
20AQI
17AQI
18AQI
14AQI
18AQI
25AQI
30AQI
31AQI
34AQI
54AQI
64AQI
58AQI
39AQI
32AQI
36AQI
28AQI
24AQI
21AQI
19AQI
19AQI
20AQI
14AQI
16AQI
18AQI
16AQI
22AQI
23AQI
21AQI
18AQI
21AQI
19AQI
20AQI
25AQI
29AQI
34AQI
24AQI
23AQI
20AQI
15AQI
18AQI
20AQI
21AQI
21AQI
18AQI
15AQI
18AQI
18AQI
17AQI
17AQI
23AQI
19AQI
17AQI
14AQI
17AQI
18AQI
15AQI
16AQI
17AQI
20AQI
18AQI
21AQI
23AQI
18AQI
24AQI
22AQI
35AQI
31AQI
26AQI
26AQI
24AQI
21AQI
18AQI
17AQI
16AQI
18AQI
18AQI
13AQI
14AQI
19AQI
19AQI
16AQI
22AQI
23AQI
23AQI
32AQI
22AQI
23AQI
23AQI
25AQI
24AQI
20AQI
19AQI
19AQI
28AQI
26AQI
28AQI
27AQI
20AQI
12AQI
13AQI
15AQI
15AQI
15AQI
19AQI
19AQI
22AQI
38AQI
41AQI
46AQI
45AQI
48AQI
53AQI
65AQI
79AQI
80AQI
84AQI
63AQI
51AQI
54AQI
54AQI
43AQI
44AQI
41AQI
43AQI
39AQI
34AQI
35AQI
38AQI
42AQI
44AQI
46AQI
42AQI
41AQI
38AQI
44AQI
41AQI
37AQI
34AQI
33AQI
41AQI
45AQI
61AQI
52AQI
51AQI
48AQI
47AQI
50AQI
38AQI
39AQI
36AQI
32AQI
35AQI
35AQI
37AQI
40AQI
43AQI
45AQI
48AQI
50AQI
50AQI
49AQI
57AQI
56AQI
54AQI
50AQI
47AQI
52AQI
55AQI
53AQI
43AQI
38AQI
37AQI
44AQI
36AQI
30AQI
30AQI
39AQI
43AQI
37AQI
32AQI
32AQI
28AQI
37AQI
39AQI
41AQI
49AQI
46AQI
37AQI
40AQI
30AQI
31AQI
30AQI
32AQI
35AQI
51AQI
40AQI
29AQI
31AQI
33AQI
20AQI
20AQI
21AQI
48AQI
46AQI
37AQI
No. of days
202532AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
May20AQI
202435AQI
Highest AQI recorded in
July43AQI
Lowest AQI recorded in
December26AQI
202335AQI
Highest AQI recorded in
April44AQI
Lowest AQI recorded in
August24AQI
202235AQI
Highest AQI recorded in
June50AQI
Lowest AQI recorded in
August24AQI
202122AQI
Highest AQI recorded in
June32AQI
Lowest AQI recorded in
January13AQI
202017AQI
Highest AQI recorded in
August23AQI
Lowest AQI recorded in
April12AQI
Most & Least Polluted Years Over the Last 6 Years
Yamatocho's annual 2025 AQI (32) shows an average percentage change of 20.01% (worsened AQI) compared to previous years: 2020 (17), 2021 (22), 2022 (35), 2023 (35), 2024 (35).