Shiroyamacho, Oyama, Kanagawa, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Shiroyamacho, Oyama, Kanagawa, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Shiroyamacho, Oyama, Kanagawa, Japan
5 AM4th Oct 2025
5 PM
4 AM5th Oct 2025
AQI
AQI
68AQI
20AQI
In the last 24 hours,
Shiroyamacho's AQI reached its highest point of 68 at 4 AM during the Night, while the lowest point, 20, was recorded at 10 PM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Shiroyamacho, Oyama, Kanagawa, Japan
26°C23/27°C
26°C25/27°C
26°C26/27°C
27°C27/28°C
27°C27/28°C
27°C27/27°C
27°C25/27°C
25°C25/27°C
26°C25/27°C
28°C27/28°C
26°C26/27°C
27°C26/27°C
27°C26/28°C
27°C24/28°C
23°C21/24°C
25°C24/25°C
26°C23/28°C
23°C22/24°C
23°C22/25°C
23°C22/24°C
23°C22/25°C
25°C24/26°C
24°C23/25°C
25°C24/25°C
25°C24/27°C
24°C22/25°C
21°C20/22°C
23°C21/24°C
24°C23/24°C
--°C/°C
--°C/°C
39AQI
35AQI
34AQI
31AQI
2025 Days Vs Air Quality
Shiroyamacho, Oyama, Kanagawa, Japan
92%
254
8%
23
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 277 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
Shiroyamacho, Oyama, Kanagawa, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
36AQI
26AQI
25AQI
24AQI
41AQI
27AQI
34AQI
29AQI
25AQI
25AQI
24AQI
30AQI
28AQI
32AQI
22AQI
27AQI
25AQI
28AQI
28AQI
31AQI
33AQI
37AQI
37AQI
35AQI
36AQI
28AQI
31AQI
31AQI
29AQI
27AQI
27AQI
26AQI
28AQI
28AQI
30AQI
29AQI
29AQI
30AQI
29AQI
27AQI
29AQI
30AQI
30AQI
28AQI
30AQI
30AQI
33AQI
29AQI
30AQI
29AQI
31AQI
30AQI
32AQI
32AQI
34AQI
34AQI
36AQI
38AQI
48AQI
43AQI
40AQI
34AQI
27AQI
30AQI
32AQI
30AQI
33AQI
33AQI
29AQI
28AQI
31AQI
25AQI
24AQI
18AQI
18AQI
16AQI
15AQI
18AQI
25AQI
27AQI
32AQI
33AQI
54AQI
84AQI
61AQI
46AQI
35AQI
35AQI
30AQI
28AQI
21AQI
19AQI
21AQI
21AQI
17AQI
19AQI
21AQI
24AQI
30AQI
26AQI
28AQI
22AQI
28AQI
21AQI
25AQI
29AQI
37AQI
39AQI
32AQI
32AQI
27AQI
21AQI
23AQI
21AQI
24AQI
28AQI
24AQI
21AQI
26AQI
22AQI
23AQI
22AQI
31AQI
23AQI
21AQI
18AQI
20AQI
22AQI
19AQI
22AQI
20AQI
25AQI
22AQI
27AQI
28AQI
24AQI
35AQI
37AQI
54AQI
34AQI
29AQI
28AQI
31AQI
25AQI
23AQI
23AQI
21AQI
23AQI
17AQI
14AQI
16AQI
23AQI
22AQI
26AQI
30AQI
34AQI
42AQI
47AQI
30AQI
22AQI
23AQI
30AQI
27AQI
26AQI
35AQI
33AQI
40AQI
38AQI
34AQI
29AQI
26AQI
19AQI
19AQI
19AQI
21AQI
18AQI
23AQI
25AQI
26AQI
31AQI
31AQI
34AQI
34AQI
35AQI
48AQI
60AQI
76AQI
78AQI
72AQI
56AQI
54AQI
57AQI
53AQI
45AQI
47AQI
43AQI
45AQI
40AQI
36AQI
33AQI
33AQI
29AQI
28AQI
27AQI
25AQI
26AQI
24AQI
24AQI
26AQI
26AQI
29AQI
33AQI
40AQI
45AQI
65AQI
51AQI
51AQI
50AQI
45AQI
51AQI
44AQI
40AQI
36AQI
35AQI
34AQI
35AQI
35AQI
39AQI
41AQI
44AQI
45AQI
48AQI
47AQI
46AQI
55AQI
56AQI
52AQI
51AQI
47AQI
52AQI
55AQI
54AQI
41AQI
34AQI
36AQI
35AQI
27AQI
27AQI
29AQI
36AQI
41AQI
35AQI
29AQI
29AQI
26AQI
34AQI
33AQI
38AQI
48AQI
50AQI
34AQI
32AQI
30AQI
27AQI
27AQI
27AQI
26AQI
34AQI
29AQI
28AQI
40AQI
37AQI
33AQI
40AQI
43AQI
49AQI
30AQI
30AQI
33AQI
25AQI
25AQI
28AQI
41AQI
46AQI
33AQI
41AQI
No. of days
202533AQI
Highest AQI recorded in
August46AQI
Lowest AQI recorded in
April25AQI
202427AQI
Highest AQI recorded in
September40AQI
Lowest AQI recorded in
February10AQI
202317AQI
Highest AQI recorded in
December18AQI
Lowest AQI recorded in
November10AQI
202032AQI
Highest AQI recorded in
July37AQI
Lowest AQI recorded in
September14AQI
Most & Least Polluted Years Over the Last 4 Years
Shiroyamacho's annual 2025 AQI (33) shows an average percentage change of 37.7% (worsened AQI) compared to previous years: 2020 (32), 2023 (17), 2024 (27).