Osaka Prefecture, Sayama, Osaka, 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
Osaka Prefecture, Sayama, Osaka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (14th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 38 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 14th Aug - 15th Aug 2025
Osaka Prefecture, Sayama, Osaka, Japan
5 AM14th Aug 2025
7 PM
4 AM15th Aug 2025
AQI
AQI
56AQI
32AQI
In the last 24 hours,
Osaka Prefecture's AQI reached its highest point of 56 at 2 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 14th Aug and 15th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Osaka Prefecture, Sayama, Osaka, Japan
29°C25/34°C
25°C24/28°C
28°C23/33°C
28°C24/33°C
29°C25/33°C
29°C26/32°C
29°C26/33°C
30°C26/34°C
30°C26/34°C
30°C26/34°C
29°C25/34°C
29°C25/34°C
30°C26/34°C
31°C26/36°C
30°C27/35°C
30°C27/35°C
30°C27/34°C
31°C27/36°C
31°C27/35°C
31°C27/36°C
31°C27/35°C
31°C28/35°C
28°C26/32°C
28°C25/32°C
27°C25/30°C
26°C24/26°C
27°C26/30°C
26°C24/27°C
29°C25/33°C
--°C/°C
--°C/°C
43AQI
37AQI
43AQI
39AQI
2025 Days Vs Air Quality
Osaka Prefecture, Sayama, Osaka, Japan
72%
163
28%
63
Total number of days with different AQI categories in last 226 days in 2025 (139 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 226 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
Osaka Prefecture, Sayama, Osaka, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
36AQI
31AQI
32AQI
33AQI
41AQI
32AQI
33AQI
31AQI
26AQI
28AQI
37AQI
40AQI
50AQI
46AQI
39AQI
35AQI
36AQI
37AQI
46AQI
41AQI
55AQI
69AQI
65AQI
46AQI
40AQI
47AQI
37AQI
37AQI
40AQI
68AQI
66AQI
46AQI
49AQI
40AQI
40AQI
33AQI
35AQI
31AQI
30AQI
31AQI
30AQI
48AQI
30AQI
48AQI
29AQI
57AQI
37AQI
39AQI
31AQI
30AQI
29AQI
35AQI
35AQI
33AQI
37AQI
38AQI
62AQI
67AQI
76AQI
100AQI
50AQI
48AQI
37AQI
41AQI
35AQI
39AQI
37AQI
44AQI
34AQI
44AQI
50AQI
45AQI
38AQI
26AQI
39AQI
30AQI
28AQI
43AQI
55AQI
60AQI
65AQI
70AQI
71AQI
79AQI
54AQI
44AQI
40AQI
34AQI
38AQI
32AQI
45AQI
24AQI
30AQI
39AQI
40AQI
48AQI
47AQI
54AQI
55AQI
52AQI
54AQI
34AQI
48AQI
25AQI
43AQI
48AQI
55AQI
58AQI
46AQI
44AQI
49AQI
36AQI
33AQI
61AQI
55AQI
59AQI
46AQI
52AQI
63AQI
57AQI
41AQI
48AQI
39AQI
44AQI
25AQI
31AQI
29AQI
33AQI
29AQI
31AQI
49AQI
53AQI
57AQI
54AQI
53AQI
43AQI
53AQI
54AQI
61AQI
41AQI
37AQI
50AQI
32AQI
26AQI
29AQI
29AQI
31AQI
39AQI
32AQI
36AQI
42AQI
48AQI
28AQI
45AQI
44AQI
47AQI
52AQI
63AQI
42AQI
37AQI
37AQI
49AQI
52AQI
34AQI
30AQI
40AQI
35AQI
48AQI
51AQI
57AQI
53AQI
52AQI
42AQI
38AQI
37AQI
36AQI
52AQI
51AQI
52AQI
56AQI
60AQI
78AQI
78AQI
97AQI
83AQI
71AQI
69AQI
72AQI
78AQI
60AQI
52AQI
53AQI
50AQI
41AQI
46AQI
53AQI
37AQI
38AQI
35AQI
34AQI
31AQI
37AQI
38AQI
35AQI
31AQI
29AQI
27AQI
33AQI
40AQI
43AQI
43AQI
45AQI
46AQI
49AQI
61AQI
51AQI
53AQI
44AQI
46AQI
49AQI
44AQI
37AQI
36AQI
40AQI
38AQI
41AQI
40AQI
48AQI
46AQI
41AQI
45AQI
51AQI
46AQI
No. of days
202545AQI
Highest AQI recorded in
July51AQI
Lowest AQI recorded in
February40AQI
202437AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
December32AQI
202340AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August27AQI
202240AQI
Highest AQI recorded in
March49AQI
Lowest AQI recorded in
August23AQI
202140AQI
Highest AQI recorded in
March46AQI
Lowest AQI recorded in
August31AQI
202042AQI
Highest AQI recorded in
August58AQI
Lowest AQI recorded in
July33AQI
Most & Least Polluted Years Over the Last 6 Years
Osaka Prefecture's annual 2025 AQI (45) shows an average percentage change of 12.1% (worsened AQI) compared to previous years: 2020 (42), 2021 (40), 2022 (40), 2023 (40), 2024 (37).