Oiso, Kanagawa, 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
Oiso, Kanagawa, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 62 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Oiso, Kanagawa, Japan
4 AM5th Aug 2025
6 PM
3 AM6th Aug 2025
AQI
AQI
62AQI
47AQI
In the last 24 hours,
Oiso's AQI reached its highest point of 62 at 10 AM during the Night, while the lowest point, undefined, was recorded at 3 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Oiso, Kanagawa, Japan
27°C26/30°C
27°C26/30°C
28°C26/29°C
27°C25/30°C
24°C23/26°C
24°C22/27°C
26°C24/28°C
26°C25/29°C
26°C25/28°C
26°C25/28°C
27°C25/29°C
26°C24/28°C
27°C25/29°C
27°C25/29°C
28°C26/30°C
28°C26/30°C
28°C26/30°C
28°C26/30°C
29°C26/31°C
29°C26/32°C
28°C26/31°C
28°C26/31°C
28°C26/31°C
29°C26/33°C
28°C25/32°C
28°C26/31°C
29°C27/31°C
29°C27/32°C
29°C27/33°C
--°C/°C
--°C/°C
46AQI
38AQI
44AQI
39AQI
2025 Days Vs Air Quality
Oiso, Kanagawa, Japan
94%
204
6%
12
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 217 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
Oiso, Kanagawa, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
29AQI
23AQI
24AQI
22AQI
47AQI
30AQI
38AQI
30AQI
28AQI
24AQI
25AQI
30AQI
26AQI
31AQI
22AQI
25AQI
25AQI
28AQI
26AQI
31AQI
34AQI
39AQI
37AQI
37AQI
34AQI
31AQI
30AQI
31AQI
29AQI
25AQI
25AQI
25AQI
28AQI
30AQI
30AQI
29AQI
29AQI
30AQI
29AQI
27AQI
28AQI
29AQI
29AQI
27AQI
28AQI
31AQI
34AQI
28AQI
30AQI
28AQI
32AQI
30AQI
31AQI
31AQI
34AQI
34AQI
36AQI
39AQI
50AQI
42AQI
39AQI
30AQI
28AQI
27AQI
31AQI
30AQI
33AQI
33AQI
31AQI
28AQI
33AQI
22AQI
19AQI
16AQI
16AQI
14AQI
14AQI
15AQI
22AQI
30AQI
30AQI
31AQI
45AQI
63AQI
55AQI
39AQI
30AQI
32AQI
27AQI
21AQI
20AQI
18AQI
18AQI
17AQI
16AQI
16AQI
19AQI
22AQI
24AQI
23AQI
23AQI
18AQI
23AQI
19AQI
20AQI
26AQI
30AQI
32AQI
26AQI
24AQI
24AQI
17AQI
18AQI
19AQI
22AQI
23AQI
21AQI
18AQI
21AQI
21AQI
17AQI
16AQI
20AQI
18AQI
17AQI
15AQI
17AQI
17AQI
14AQI
17AQI
16AQI
19AQI
18AQI
20AQI
21AQI
19AQI
22AQI
26AQI
53AQI
32AQI
30AQI
25AQI
25AQI
18AQI
19AQI
22AQI
16AQI
19AQI
15AQI
14AQI
14AQI
17AQI
17AQI
19AQI
23AQI
27AQI
37AQI
32AQI
27AQI
23AQI
24AQI
27AQI
22AQI
20AQI
24AQI
25AQI
30AQI
31AQI
30AQI
25AQI
21AQI
12AQI
14AQI
15AQI
19AQI
15AQI
18AQI
23AQI
24AQI
36AQI
37AQI
42AQI
40AQI
38AQI
50AQI
59AQI
75AQI
76AQI
72AQI
55AQI
51AQI
55AQI
51AQI
42AQI
45AQI
44AQI
44AQI
38AQI
33AQI
32AQI
33AQI
31AQI
31AQI
33AQI
30AQI
29AQI
26AQI
26AQI
28AQI
29AQI
30AQI
32AQI
42AQI
45AQI
62AQI
30AQI
30AQI
31AQI
21AQI
21AQI
23AQI
42AQI
45AQI
No. of days
202529AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
May21AQI
202433AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
December25AQI
202339AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
August31AQI
202237AQI
Highest AQI recorded in
April44AQI
Lowest AQI recorded in
August19AQI
202134AQI
Highest AQI recorded in
May40AQI
Lowest AQI recorded in
February30AQI
202035AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 6 Years
Oiso's annual 2025 AQI (29) shows an average percentage change of -19.5% (improved AQI) compared to previous years: 2020 (35), 2021 (34), 2022 (37), 2023 (39), 2024 (33).