Niikura, Niiza, 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
Niikura, Niiza, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (12th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 41 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Niikura, Niiza, Saitama, Japan
4 AM12th Aug 2025
6 PM
3 AM13th Aug 2025
AQI
AQI
43AQI
22AQI
In the last 24 hours,
Niikura's AQI reached its highest point of 43 at 4 AM during the Night, while the lowest point, undefined, was recorded at 3 AM during the Night between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Niikura, Niiza, Saitama, Japan
27°C25/30°C
28°C27/31°C
29°C26/31°C
29°C27/33°C
29°C26/33°C
29°C26/33°C
30°C27/35°C
31°C28/36°C
32°C29/36°C
32°C29/36°C
32°C29/37°C
32°C29/37°C
32°C29/37°C
32°C29/36°C
32°C29/37°C
32°C28/38°C
31°C28/36°C
29°C26/35°C
29°C27/32°C
31°C27/37°C
32°C28/37°C
33°C30/38°C
35°C30/39°C
33°C30/38°C
32°C29/34°C
30°C25/36°C
29°C25/34°C
27°C26/27°C
28°C27/30°C
--°C/°C
--°C/°C
44AQI
39AQI
42AQI
38AQI
2025 Days Vs Air Quality
Niikura, Niiza, Saitama, Japan
87%
195
13%
29
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 224 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
Niikura, Niiza, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
34AQI
25AQI
28AQI
38AQI
52AQI
33AQI
37AQI
31AQI
29AQI
30AQI
42AQI
32AQI
42AQI
39AQI
34AQI
32AQI
35AQI
50AQI
44AQI
45AQI
41AQI
52AQI
48AQI
40AQI
37AQI
38AQI
43AQI
32AQI
34AQI
30AQI
47AQI
37AQI
46AQI
34AQI
34AQI
28AQI
30AQI
29AQI
29AQI
27AQI
31AQI
41AQI
42AQI
33AQI
42AQI
43AQI
41AQI
34AQI
32AQI
29AQI
31AQI
31AQI
31AQI
33AQI
35AQI
38AQI
42AQI
56AQI
56AQI
62AQI
39AQI
39AQI
28AQI
35AQI
31AQI
39AQI
37AQI
37AQI
39AQI
50AQI
47AQI
43AQI
40AQI
28AQI
22AQI
26AQI
18AQI
26AQI
42AQI
53AQI
58AQI
59AQI
75AQI
78AQI
73AQI
50AQI
37AQI
41AQI
33AQI
30AQI
22AQI
24AQI
24AQI
29AQI
25AQI
32AQI
40AQI
30AQI
49AQI
42AQI
43AQI
36AQI
41AQI
33AQI
32AQI
48AQI
55AQI
66AQI
55AQI
50AQI
48AQI
32AQI
45AQI
47AQI
52AQI
54AQI
47AQI
36AQI
50AQI
42AQI
34AQI
30AQI
39AQI
33AQI
29AQI
24AQI
32AQI
33AQI
22AQI
25AQI
29AQI
36AQI
38AQI
39AQI
45AQI
29AQI
45AQI
46AQI
65AQI
58AQI
46AQI
47AQI
46AQI
33AQI
33AQI
26AQI
28AQI
33AQI
28AQI
19AQI
26AQI
33AQI
35AQI
30AQI
42AQI
46AQI
50AQI
59AQI
48AQI
37AQI
34AQI
41AQI
45AQI
37AQI
30AQI
36AQI
47AQI
43AQI
44AQI
42AQI
35AQI
24AQI
23AQI
21AQI
19AQI
21AQI
25AQI
25AQI
29AQI
34AQI
36AQI
42AQI
46AQI
47AQI
49AQI
56AQI
71AQI
76AQI
81AQI
65AQI
55AQI
56AQI
55AQI
47AQI
46AQI
45AQI
45AQI
41AQI
37AQI
37AQI
37AQI
37AQI
40AQI
41AQI
38AQI
38AQI
36AQI
39AQI
37AQI
33AQI
33AQI
33AQI
39AQI
44AQI
58AQI
51AQI
50AQI
48AQI
47AQI
49AQI
41AQI
42AQI
41AQI
37AQI
36AQI
43AQI
41AQI
36AQI
35AQI
47AQI
45AQI
No. of days
202540AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
June35AQI
202440AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
August33AQI
202343AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
August30AQI
202241AQI
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
August21AQI
202140AQI
Highest AQI recorded in
March46AQI
Lowest AQI recorded in
July34AQI
202038AQI
Highest AQI recorded in
June47AQI
Lowest AQI recorded in
September19AQI
Most & Least Polluted Years Over the Last 6 Years
Niikura's annual 2025 AQI (40) shows an average percentage change of -1.6% (improved AQI) compared to previous years: 2020 (38), 2021 (40), 2022 (41), 2023 (43), 2024 (40).