Shimotoda, 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
Shimotoda, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 39 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Shimotoda, Saitama, Japan
5 AM20th Sep 2025
6 PM
4 AM21st Sep 2025
AQI
AQI
43AQI
18AQI
In the last 24 hours,
Shimotoda's AQI reached its highest point of 43 at 3 AM during the Night, while the lowest point, 18, was recorded at 11 AM during the Night between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Shimotoda, Saitama, Japan
32°C28/36°C
33°C29/37°C
33°C30/38°C
32°C29/37°C
31°C29/35°C
32°C29/37°C
30°C28/32°C
30°C27/34°C
33°C29/38°C
33°C30/37°C
32°C29/36°C
33°C30/37°C
32°C29/37°C
27°C27/28°C
25°C24/26°C
28°C24/33°C
29°C26/33°C
31°C27/36°C
30°C28/33°C
29°C28/31°C
27°C24/30°C
25°C24/28°C
27°C24/31°C
29°C27/33°C
29°C27/32°C
30°C28/33°C
31°C28/35°C
30°C24/37°C
23°C22/23°C
--°C/°C
--°C/°C
45AQI
40AQI
42AQI
40AQI
2025 Days Vs Air Quality
Shimotoda, Saitama, Japan
89%
234
11%
28
Total number of days with different AQI categories in last 263 days in 2025 (102 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 263 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
Shimotoda, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
33AQI
26AQI
28AQI
34AQI
50AQI
31AQI
34AQI
30AQI
29AQI
28AQI
39AQI
31AQI
41AQI
37AQI
34AQI
33AQI
34AQI
45AQI
41AQI
43AQI
41AQI
48AQI
46AQI
40AQI
36AQI
36AQI
42AQI
31AQI
34AQI
29AQI
42AQI
35AQI
41AQI
32AQI
32AQI
27AQI
30AQI
29AQI
29AQI
27AQI
30AQI
40AQI
36AQI
34AQI
32AQI
40AQI
37AQI
33AQI
31AQI
29AQI
30AQI
30AQI
31AQI
32AQI
33AQI
38AQI
40AQI
53AQI
52AQI
60AQI
39AQI
39AQI
28AQI
35AQI
32AQI
38AQI
36AQI
38AQI
40AQI
49AQI
45AQI
41AQI
38AQI
28AQI
23AQI
26AQI
18AQI
25AQI
38AQI
48AQI
52AQI
52AQI
69AQI
75AQI
69AQI
48AQI
36AQI
38AQI
31AQI
28AQI
21AQI
22AQI
23AQI
28AQI
23AQI
29AQI
35AQI
28AQI
43AQI
39AQI
39AQI
33AQI
36AQI
29AQI
29AQI
40AQI
48AQI
59AQI
46AQI
44AQI
42AQI
28AQI
41AQI
42AQI
45AQI
47AQI
43AQI
33AQI
42AQI
37AQI
31AQI
30AQI
36AQI
32AQI
29AQI
24AQI
30AQI
30AQI
23AQI
23AQI
24AQI
32AQI
34AQI
35AQI
40AQI
26AQI
41AQI
41AQI
59AQI
53AQI
41AQI
42AQI
40AQI
30AQI
29AQI
24AQI
24AQI
29AQI
25AQI
18AQI
23AQI
28AQI
33AQI
27AQI
37AQI
41AQI
44AQI
52AQI
45AQI
35AQI
32AQI
39AQI
41AQI
33AQI
29AQI
33AQI
45AQI
41AQI
40AQI
39AQI
31AQI
23AQI
22AQI
21AQI
19AQI
20AQI
27AQI
28AQI
33AQI
39AQI
41AQI
45AQI
46AQI
46AQI
50AQI
60AQI
75AQI
77AQI
82AQI
64AQI
51AQI
53AQI
53AQI
43AQI
42AQI
41AQI
42AQI
37AQI
33AQI
33AQI
35AQI
37AQI
41AQI
42AQI
38AQI
38AQI
35AQI
40AQI
37AQI
32AQI
32AQI
33AQI
41AQI
45AQI
59AQI
51AQI
51AQI
47AQI
43AQI
47AQI
37AQI
38AQI
36AQI
33AQI
36AQI
34AQI
36AQI
39AQI
43AQI
45AQI
48AQI
50AQI
50AQI
48AQI
56AQI
55AQI
53AQI
50AQI
46AQI
50AQI
54AQI
52AQI
44AQI
38AQI
37AQI
38AQI
32AQI
29AQI
30AQI
40AQI
42AQI
38AQI
32AQI
32AQI
29AQI
35AQI
38AQI
40AQI
48AQI
45AQI
39AQI
36AQI
34AQI
41AQI
36AQI
33AQI
33AQI
46AQI
45AQI
37AQI
No. of days
202538AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
May33AQI
202438AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
August32AQI
202339AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August28AQI
202239AQI
Highest AQI recorded in
March46AQI
Lowest AQI recorded in
September31AQI
202135AQI
Highest AQI recorded in
May42AQI
Lowest AQI recorded in
April31AQI
202032AQI
Highest AQI recorded in
August40AQI
Lowest AQI recorded in
September24AQI
Most & Least Polluted Years Over the Last 6 Years
Shimotoda's annual 2025 AQI (38) shows an average percentage change of 4.6% (worsened AQI) compared to previous years: 2020 (32), 2021 (35), 2022 (39), 2023 (39), 2024 (38).