Nishinoyamacho, Sayama, Osaka, 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
Nishinoyamacho, Sayama, Osaka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 57 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Nishinoyamacho, Sayama, Osaka, Japan
5 AM18th Oct 2025
5 PM
4 AM19th Oct 2025
58AQI
45AQI
63AQI
42AQI
In the last 24 hours,
Nishinoyamacho's AQI reached its highest point of 63 at 11 PM during the Night, while the lowest point, 42, was recorded at 4 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Nishinoyamacho, Sayama, Osaka, Japan
26°C23/30°C
26°C24/30°C
25°C22/29°C
23°C20/27°C
23°C21/25°C
24°C22/29°C
25°C22/28°C
26°C22/30°C
24°C21/29°C
24°C20/29°C
24°C21/26°C
23°C19/27°C
23°C20/27°C
23°C19/27°C
22°C20/23°C
22°C20/25°C
24°C22/28°C
23°C20/27°C
24°C20/28°C
25°C21/30°C
23°C20/26°C
21°C19/23°C
24°C21/28°C
24°C22/27°C
23°C21/26°C
24°C20/29°C
23°C21/27°C
24°C21/28°C
22°C19/27°C
23°C19/28°C
--°C/°C
45AQI
41AQI
50AQI
42AQI
2025 Days Vs Air Quality
Nishinoyamacho, Sayama, Osaka, Japan
71%
206
29%
84
0.3%
1
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 71%
Health Risk Level:
Low
In 2025, 71% of 292 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
Nishinoyamacho, Sayama, Osaka, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
34AQI
32AQI
31AQI
32AQI
30AQI
31AQI
30AQI
29AQI
25AQI
26AQI
31AQI
35AQI
44AQI
40AQI
37AQI
32AQI
33AQI
34AQI
36AQI
40AQI
47AQI
62AQI
65AQI
44AQI
39AQI
41AQI
35AQI
34AQI
39AQI
67AQI
61AQI
43AQI
44AQI
40AQI
39AQI
32AQI
34AQI
31AQI
29AQI
32AQI
31AQI
40AQI
31AQI
39AQI
29AQI
42AQI
37AQI
35AQI
29AQI
30AQI
30AQI
36AQI
35AQI
34AQI
36AQI
36AQI
56AQI
57AQI
64AQI
79AQI
46AQI
41AQI
31AQI
38AQI
34AQI
38AQI
37AQI
42AQI
32AQI
35AQI
48AQI
40AQI
34AQI
24AQI
37AQI
29AQI
28AQI
38AQI
51AQI
55AQI
61AQI
65AQI
69AQI
74AQI
54AQI
46AQI
43AQI
38AQI
35AQI
35AQI
38AQI
27AQI
29AQI
40AQI
41AQI
45AQI
44AQI
49AQI
53AQI
53AQI
55AQI
35AQI
48AQI
26AQI
43AQI
49AQI
56AQI
59AQI
49AQI
44AQI
48AQI
35AQI
36AQI
59AQI
53AQI
57AQI
45AQI
53AQI
60AQI
56AQI
41AQI
48AQI
39AQI
43AQI
28AQI
34AQI
32AQI
36AQI
32AQI
33AQI
50AQI
53AQI
57AQI
55AQI
53AQI
46AQI
56AQI
55AQI
66AQI
46AQI
40AQI
53AQI
36AQI
32AQI
34AQI
32AQI
32AQI
43AQI
36AQI
41AQI
44AQI
50AQI
31AQI
44AQI
44AQI
49AQI
53AQI
64AQI
48AQI
37AQI
40AQI
53AQI
55AQI
38AQI
32AQI
43AQI
39AQI
49AQI
50AQI
58AQI
54AQI
52AQI
44AQI
38AQI
39AQI
40AQI
51AQI
51AQI
53AQI
57AQI
60AQI
77AQI
81AQI
102AQI
86AQI
72AQI
70AQI
72AQI
77AQI
62AQI
52AQI
52AQI
48AQI
39AQI
48AQI
52AQI
37AQI
38AQI
36AQI
36AQI
33AQI
37AQI
40AQI
37AQI
33AQI
33AQI
28AQI
35AQI
42AQI
45AQI
44AQI
46AQI
45AQI
49AQI
60AQI
50AQI
52AQI
45AQI
50AQI
51AQI
46AQI
39AQI
35AQI
39AQI
47AQI
48AQI
47AQI
43AQI
45AQI
43AQI
45AQI
40AQI
38AQI
49AQI
53AQI
55AQI
57AQI
55AQI
54AQI
55AQI
55AQI
55AQI
39AQI
33AQI
37AQI
26AQI
22AQI
27AQI
32AQI
35AQI
37AQI
34AQI
29AQI
30AQI
28AQI
39AQI
33AQI
45AQI
50AQI
34AQI
35AQI
43AQI
28AQI
31AQI
36AQI
29AQI
32AQI
32AQI
30AQI
33AQI
30AQI
23AQI
34AQI
58AQI
64AQI
54AQI
51AQI
54AQI
57AQI
52AQI
52AQI
57AQI
51AQI
50AQI
51AQI
56AQI
53AQI
53AQI
57AQI
57AQI
38AQI
37AQI
45AQI
45AQI
43AQI
47AQI
52AQI
48AQI
33AQI
53AQI
No. of days
202544AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
September33AQI
202437AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
December30AQI
202339AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August29AQI
202237AQI
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
August20AQI
202136AQI
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
January30AQI
202036AQI
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
July27AQI
Most & Least Polluted Years Over the Last 6 Years
Nishinoyamacho's annual 2025 AQI (44) shows an average percentage change of 18.3% (worsened AQI) compared to previous years: 2020 (36), 2021 (36), 2022 (37), 2023 (39), 2024 (37).