Yorii, Yorii, 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
Yorii, Yorii, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (5th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 50 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Yorii, Yorii, Saitama, Japan
4 AM5th Aug 2025
6 PM
3 AM6th Aug 2025
62AQI
46AQI
51AQI
40AQI
In the last 24 hours,
Yorii's AQI reached its highest point of 62 at 12 PM during the Day, while the lowest point, 40, was recorded at 11 PM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Yorii, Yorii, Saitama, Japan
29°C25/35°C
29°C26/35°C
29°C25/35°C
28°C23/33°C
22°C20/22°C
23°C20/28°C
26°C22/30°C
25°C23/28°C
27°C24/33°C
28°C24/34°C
27°C24/32°C
27°C23/34°C
28°C23/34°C
29°C23/36°C
30°C24/37°C
30°C25/37°C
30°C24/37°C
30°C24/37°C
30°C24/37°C
30°C24/38°C
30°C25/37°C
30°C25/37°C
31°C25/37°C
29°C24/36°C
28°C23/35°C
26°C23/31°C
30°C25/38°C
30°C25/37°C
32°C27/38°C
32°C26/39°C
--°C/°C
51AQI
47AQI
48AQI
48AQI
2025 Days Vs Air Quality
Yorii, Yorii, Saitama, Japan
82%
178
18%
39
Total number of days with different AQI categories in last 218 days in 2025 (147 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2025, 82% of 218 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
Yorii, Yorii, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
27AQI
26AQI
27AQI
31AQI
48AQI
30AQI
36AQI
28AQI
27AQI
25AQI
34AQI
28AQI
29AQI
30AQI
27AQI
28AQI
28AQI
38AQI
36AQI
40AQI
35AQI
42AQI
44AQI
36AQI
36AQI
32AQI
39AQI
32AQI
33AQI
33AQI
41AQI
50AQI
45AQI
38AQI
36AQI
30AQI
30AQI
30AQI
29AQI
29AQI
30AQI
37AQI
33AQI
33AQI
31AQI
38AQI
38AQI
32AQI
32AQI
32AQI
32AQI
32AQI
33AQI
33AQI
34AQI
36AQI
43AQI
50AQI
54AQI
55AQI
41AQI
38AQI
26AQI
34AQI
32AQI
42AQI
38AQI
40AQI
48AQI
50AQI
54AQI
43AQI
39AQI
24AQI
22AQI
26AQI
18AQI
23AQI
36AQI
45AQI
56AQI
62AQI
73AQI
76AQI
72AQI
58AQI
36AQI
37AQI
33AQI
28AQI
21AQI
24AQI
18AQI
32AQI
27AQI
33AQI
41AQI
28AQI
47AQI
41AQI
45AQI
31AQI
28AQI
26AQI
27AQI
45AQI
56AQI
67AQI
69AQI
43AQI
58AQI
37AQI
41AQI
47AQI
49AQI
53AQI
56AQI
38AQI
49AQI
47AQI
35AQI
33AQI
38AQI
36AQI
34AQI
25AQI
35AQI
33AQI
25AQI
22AQI
28AQI
36AQI
45AQI
45AQI
51AQI
36AQI
46AQI
46AQI
58AQI
69AQI
60AQI
53AQI
50AQI
31AQI
33AQI
32AQI
31AQI
39AQI
29AQI
23AQI
22AQI
35AQI
33AQI
29AQI
38AQI
46AQI
53AQI
61AQI
56AQI
43AQI
32AQI
41AQI
49AQI
44AQI
32AQI
42AQI
49AQI
45AQI
50AQI
50AQI
45AQI
32AQI
32AQI
33AQI
28AQI
26AQI
33AQI
37AQI
46AQI
50AQI
53AQI
44AQI
51AQI
48AQI
52AQI
55AQI
73AQI
77AQI
78AQI
62AQI
48AQI
53AQI
53AQI
40AQI
37AQI
43AQI
40AQI
42AQI
40AQI
42AQI
47AQI
50AQI
53AQI
52AQI
51AQI
52AQI
47AQI
51AQI
49AQI
39AQI
41AQI
37AQI
41AQI
46AQI
56AQI
50AQI
33AQI
35AQI
43AQI
40AQI
39AQI
40AQI
50AQI
46AQI
No. of days
202540AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
January33AQI
202437AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
December29AQI
202340AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
August29AQI
202239AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August30AQI
202136AQI
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
December30AQI
202041AQI
Highest AQI recorded in
August63AQI
Lowest AQI recorded in
October30AQI
Most & Least Polluted Years Over the Last 6 Years
Yorii's annual 2025 AQI (40) shows an average percentage change of 4.06% (worsened AQI) compared to previous years: 2020 (41), 2021 (36), 2022 (39), 2023 (40), 2024 (37).