Oyama, 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
Oyama, Kanagawa, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (7th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Aug - 10th Aug 2025
Oyama, Kanagawa, Japan
4 AM9th Aug 2025
6 PM
3 AM10th Aug 2025
49AQI
26AQI
51AQI
47AQI
In the last 24 hours,
Oyama's AQI reached its highest point of 51 at 8 PM during the Night, while the lowest point, 26, was recorded at 10 AM during the Day between 9th Aug and 10th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Oyama, Kanagawa, Japan
24°C23/25°C
24°C22/26°C
25°C24/28°C
26°C25/27°C
27°C26/27°C
26°C25/27°C
26°C26/27°C
26°C26/26°C
26°C26/27°C
27°C26/27°C
27°C26/27°C
27°C26/27°C
27°C26/27°C
27°C26/28°C
27°C27/28°C
27°C27/28°C
27°C27/28°C
27°C26/27°C
27°C26/30°C
28°C26/31°C
27°C25/29°C
27°C26/29°C
27°C26/28°C
28°C26/30°C
28°C27/29°C
28°C28/29°C
29°C28/30°C
29°C28/30°C
28°C26/29°C
27°C26/27°C
--°C/°C
44AQI
34AQI
43AQI
36AQI
2025 Days Vs Air Quality
Oyama, Kanagawa, Japan
94%
206
6%
13
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 222 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
Oyama, Kanagawa, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
33AQI
25AQI
26AQI
22AQI
44AQI
28AQI
36AQI
29AQI
26AQI
24AQI
24AQI
30AQI
28AQI
32AQI
22AQI
27AQI
26AQI
27AQI
29AQI
30AQI
34AQI
36AQI
37AQI
35AQI
35AQI
29AQI
30AQI
31AQI
29AQI
27AQI
26AQI
25AQI
29AQI
28AQI
30AQI
29AQI
28AQI
30AQI
29AQI
27AQI
29AQI
29AQI
30AQI
28AQI
29AQI
31AQI
33AQI
29AQI
29AQI
28AQI
30AQI
29AQI
32AQI
32AQI
34AQI
35AQI
36AQI
38AQI
50AQI
41AQI
41AQI
31AQI
28AQI
29AQI
32AQI
29AQI
33AQI
32AQI
30AQI
33AQI
31AQI
24AQI
22AQI
17AQI
16AQI
15AQI
14AQI
16AQI
24AQI
27AQI
30AQI
31AQI
48AQI
71AQI
58AQI
42AQI
32AQI
32AQI
30AQI
23AQI
21AQI
18AQI
19AQI
18AQI
15AQI
17AQI
19AQI
20AQI
24AQI
23AQI
22AQI
19AQI
23AQI
20AQI
20AQI
26AQI
29AQI
32AQI
26AQI
25AQI
22AQI
19AQI
20AQI
20AQI
21AQI
22AQI
21AQI
17AQI
21AQI
19AQI
18AQI
18AQI
24AQI
19AQI
18AQI
15AQI
17AQI
18AQI
16AQI
18AQI
17AQI
21AQI
18AQI
21AQI
21AQI
21AQI
26AQI
26AQI
50AQI
29AQI
28AQI
24AQI
24AQI
20AQI
20AQI
25AQI
17AQI
20AQI
15AQI
14AQI
14AQI
19AQI
21AQI
19AQI
25AQI
27AQI
36AQI
31AQI
25AQI
22AQI
22AQI
25AQI
23AQI
21AQI
28AQI
25AQI
30AQI
30AQI
27AQI
24AQI
20AQI
13AQI
14AQI
15AQI
19AQI
16AQI
20AQI
21AQI
22AQI
31AQI
31AQI
34AQI
33AQI
35AQI
50AQI
62AQI
76AQI
75AQI
68AQI
53AQI
51AQI
55AQI
51AQI
43AQI
44AQI
41AQI
43AQI
37AQI
31AQI
30AQI
30AQI
27AQI
27AQI
28AQI
24AQI
25AQI
23AQI
24AQI
28AQI
28AQI
29AQI
33AQI
41AQI
45AQI
65AQI
53AQI
53AQI
50AQI
30AQI
30AQI
32AQI
21AQI
21AQI
23AQI
40AQI
49AQI
No. of days
202529AQI
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
May21AQI
202431AQI
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
January25AQI
202330AQI
Highest AQI recorded in
April39AQI
Lowest AQI recorded in
August20AQI
202235AQI
Highest AQI recorded in
March45AQI
Lowest AQI recorded in
December26AQI
202131AQI
Highest AQI recorded in
August41AQI
Lowest AQI recorded in
February15AQI
202029AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
October13AQI
Most & Least Polluted Years Over the Last 6 Years
Oyama's annual 2025 AQI (29) shows an average percentage change of -7.3% (improved AQI) compared to previous years: 2020 (29), 2021 (31), 2022 (35), 2023 (30), 2024 (31).