Niizo, Shimotoda, Saitama, 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
Niizo, Shimotoda, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (15th August):
On this day, AQI across the 4 years varied significantly: 2026 ranks 3rd highest AQI at 32 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Niizo, Shimotoda, Saitama, Japan
4 AM14th Aug 2026
6 PM
3 AM15th Aug 2026
40AQI
12AQI
45AQI
21AQI
In the last 24 hours,
Niizo's AQI reached its highest point of 45 at 7 PM during the Night, while the lowest point, 12, was recorded at 1 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Niizo, Shimotoda, Saitama, Japan
29°C27/32°C
29°C26/32°C
29°C26/33°C
32°C28/37°C
33°C29/37°C
33°C29/38°C
33°C29/39°C
30°C28/35°C
30°C25/36°C
29°C26/33°C
27°C24/31°C
27°C24/32°C
30°C25/36°C
32°C28/37°C
32°C29/37°C
32°C28/37°C
30°C25/35°C
25°C24/27°C
26°C22/30°C
27°C23/31°C
30°C26/34°C
30°C27/34°C
30°C27/35°C
30°C27/34°C
27°C25/31°C
24°C22/29°C
24°C22/26°C
27°C23/31°C
27°C24/29°C
27°C24/31°C
43AQI
28AQI
40AQI
32AQI
2026 Days Vs Air Quality
Niizo, Shimotoda, Saitama, Japan
88%
199
12%
28
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2026, 88% of 227 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
Niizo, Shimotoda, Saitama, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
13AQI (US)
10AQI (US)
19AQI (US)
38AQI (US)
16AQI (US)
27AQI (US)
37AQI (US)
17AQI (US)
36AQI (US)
33AQI (US)
13AQI (US)
35AQI (US)
16AQI (US)
34AQI (US)
45AQI (US)
50AQI (US)
25AQI (US)
45AQI (US)
38AQI (US)
12AQI (US)
24AQI (US)
36AQI (US)
40AQI (US)
44AQI (US)
24AQI (US)
40AQI (US)
12AQI (US)
18AQI (US)
36AQI (US)
38AQI (US)
38AQI (US)
24AQI (US)
22AQI (US)
38AQI (US)
60AQI (US)
52AQI (US)
13AQI (US)
15AQI (US)
35AQI (US)
41AQI (US)
49AQI (US)
25AQI (US)
46AQI (US)
57AQI (US)
62AQI (US)
43AQI (US)
19AQI (US)
38AQI (US)
30AQI (US)
35AQI (US)
45AQI (US)
43AQI (US)
43AQI (US)
45AQI (US)
23AQI (US)
10AQI (US)
28AQI (US)
40AQI (US)
35AQI (US)
59AQI (US)
43AQI (US)
48AQI (US)
53AQI (US)
51AQI (US)
43AQI (US)
34AQI (US)
43AQI (US)
56AQI (US)
58AQI (US)
64AQI (US)
37AQI (US)
45AQI (US)
55AQI (US)
48AQI (US)
48AQI (US)
50AQI (US)
35AQI (US)
30AQI (US)
56AQI (US)
58AQI (US)
51AQI (US)
50AQI (US)
59AQI (US)
30AQI (US)
25AQI (US)
32AQI (US)
58AQI (US)
50AQI (US)
18AQI (US)
21AQI (US)
33AQI (US)
45AQI (US)
46AQI (US)
37AQI (US)
29AQI (US)
39AQI (US)
23AQI (US)
32AQI (US)
46AQI (US)
49AQI (US)
32AQI (US)
36AQI (US)
40AQI (US)
38AQI (US)
28AQI (US)
33AQI (US)
30AQI (US)
31AQI (US)
33AQI (US)
36AQI (US)
46AQI (US)
37AQI (US)
33AQI (US)
46AQI (US)
51AQI (US)
48AQI (US)
40AQI (US)
40AQI (US)
37AQI (US)
47AQI (US)
50AQI (US)
50AQI (US)
29AQI (US)
21AQI (US)
29AQI (US)
30AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
33AQI (US)
38AQI (US)
32AQI (US)
35AQI (US)
86AQI (US)
69AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
60AQI (US)
60AQI (US)
53AQI (US)
58AQI (US)
47AQI (US)
39AQI (US)
24AQI (US)
24AQI (US)
23AQI (US)
27AQI (US)
37AQI (US)
44AQI (US)
29AQI (US)
26AQI (US)
23AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
37AQI (US)
43AQI (US)
18AQI (US)
17AQI (US)
23AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
19AQI (US)
14AQI (US)
39AQI (US)
21AQI (US)
29AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
33AQI (US)
27AQI (US)
45AQI (US)
46AQI (US)
31AQI (US)
20AQI (US)
38AQI (US)
48AQI (US)
63AQI (US)
56AQI (US)
43AQI (US)
27AQI (US)
22AQI (US)
24AQI (US)
34AQI (US)
36AQI (US)
36AQI (US)
48AQI (US)
56AQI (US)
48AQI (US)
21AQI (US)
35AQI (US)
28AQI (US)
24AQI (US)
33AQI (US)
45AQI (US)
33AQI (US)
29AQI (US)
35AQI (US)
27AQI (US)
26AQI (US)
23AQI (US)
32AQI (US)
29AQI (US)
36AQI (US)
46AQI (US)
37AQI (US)
41AQI (US)
25AQI (US)
32AQI (US)
33AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
March46AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202541AQI (US)
Highest AQI (US) recorded in
July46AQI (US)
Lowest AQI (US) recorded in
May35AQI (US)
202343AQI (US)
Highest AQI (US) recorded in
April51AQI (US)
Lowest AQI (US) recorded in
August32AQI (US)
202241AQI (US)
Highest AQI (US) recorded in
March47AQI (US)
Lowest AQI (US) recorded in
August27AQI (US)
202138AQI (US)
Highest AQI (US) recorded in
May44AQI (US)
Lowest AQI (US) recorded in
April35AQI (US)
202035AQI (US)
Highest AQI (US) recorded in
August44AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
Most & Least Polluted Years Over the Last 6 Years
Niizo's annual 2026 AQI (US) (35) shows an average percentage change of -11.1% (improved AQI (US)) compared to previous years: 2020 (35), 2021 (38), 2022 (41), 2023 (43), 2025 (41).