Yakage, Okayama, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Yakage, Okayama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (24th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 29 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 25th Sep - 26th Sep 2025
Yakage, Okayama, Japan
5 AM25th Sep 2025
6 PM
4 AM26th Sep 2025
29AQI
18AQI
37AQI
22AQI
In the last 24 hours,
Yakage's AQI reached its highest point of 37 at 7 PM during the Night, while the lowest point, 18, was recorded at 10 AM during the Day between 25th Sep and 26th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Yakage, Okayama, Japan
28°C25/32°C
28°C25/31°C
29°C26/32°C
30°C26/33°C
30°C26/33°C
29°C26/33°C
29°C26/33°C
29°C25/32°C
25°C24/26°C
27°C25/33°C
27°C24/30°C
28°C25/32°C
27°C25/30°C
28°C25/31°C
25°C24/27°C
26°C23/29°C
26°C22/30°C
27°C24/30°C
28°C26/31°C
28°C25/32°C
28°C25/31°C
28°C26/31°C
25°C22/28°C
24°C21/27°C
25°C22/27°C
24°C20/28°C
22°C19/26°C
21°C20/22°C
24°C20/28°C
24°C23/27°C
--°C/°C
37AQI
31AQI
36AQI
35AQI
2025 Days Vs Air Quality
Yakage, Okayama, Japan
63%
167
36%
97
1%
3
Total number of days with different AQI categories in last 269 days in 2025 (96 days remaining)
Under WHO’s Safe Air Quality Limits: 63%
Health Risk Level:
Moderate
In 2025, 63% of 269 days were within WHO’s safe air quality limits, and 37% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Yakage, Okayama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI
41AQI
32AQI
36AQI
37AQI
53AQI
34AQI
37AQI
29AQI
29AQI
31AQI
34AQI
37AQI
49AQI
40AQI
40AQI
35AQI
40AQI
50AQI
54AQI
51AQI
65AQI
85AQI
76AQI
49AQI
44AQI
38AQI
41AQI
33AQI
47AQI
66AQI
73AQI
53AQI
60AQI
42AQI
40AQI
33AQI
40AQI
32AQI
33AQI
32AQI
35AQI
43AQI
32AQI
43AQI
29AQI
53AQI
41AQI
40AQI
36AQI
35AQI
32AQI
35AQI
33AQI
36AQI
40AQI
42AQI
68AQI
79AQI
109AQI
118AQI
63AQI
53AQI
38AQI
40AQI
38AQI
44AQI
46AQI
46AQI
50AQI
56AQI
57AQI
52AQI
42AQI
29AQI
39AQI
35AQI
42AQI
51AQI
60AQI
66AQI
70AQI
55AQI
72AQI
84AQI
84AQI
57AQI
53AQI
43AQI
44AQI
42AQI
43AQI
29AQI
41AQI
44AQI
51AQI
52AQI
54AQI
68AQI
66AQI
67AQI
59AQI
47AQI
54AQI
34AQI
52AQI
53AQI
65AQI
66AQI
62AQI
50AQI
54AQI
55AQI
41AQI
70AQI
67AQI
64AQI
58AQI
52AQI
64AQI
59AQI
42AQI
54AQI
44AQI
52AQI
36AQI
41AQI
33AQI
39AQI
37AQI
43AQI
55AQI
58AQI
66AQI
64AQI
60AQI
49AQI
52AQI
61AQI
68AQI
61AQI
40AQI
53AQI
42AQI
29AQI
37AQI
41AQI
46AQI
49AQI
45AQI
43AQI
50AQI
58AQI
34AQI
49AQI
40AQI
59AQI
62AQI
72AQI
53AQI
39AQI
48AQI
67AQI
62AQI
41AQI
36AQI
45AQI
41AQI
51AQI
54AQI
61AQI
58AQI
58AQI
49AQI
46AQI
46AQI
47AQI
56AQI
60AQI
59AQI
62AQI
60AQI
81AQI
85AQI
103AQI
87AQI
70AQI
70AQI
69AQI
81AQI
72AQI
60AQI
54AQI
50AQI
42AQI
50AQI
58AQI
40AQI
41AQI
35AQI
35AQI
30AQI
41AQI
43AQI
37AQI
28AQI
26AQI
25AQI
29AQI
39AQI
41AQI
46AQI
44AQI
43AQI
42AQI
57AQI
46AQI
49AQI
47AQI
48AQI
47AQI
43AQI
33AQI
33AQI
39AQI
46AQI
42AQI
41AQI
36AQI
45AQI
42AQI
45AQI
41AQI
40AQI
45AQI
50AQI
52AQI
52AQI
53AQI
50AQI
53AQI
53AQI
52AQI
39AQI
32AQI
43AQI
25AQI
22AQI
26AQI
32AQI
36AQI
32AQI
34AQI
30AQI
29AQI
32AQI
33AQI
38AQI
41AQI
44AQI
28AQI
29AQI
40AQI
24AQI
27AQI
31AQI
29AQI
44AQI
43AQI
56AQI
54AQI
48AQI
52AQI
53AQI
45AQI
32AQI
No. of days
202548AQI
Highest AQI recorded in
March56AQI
Lowest AQI recorded in
September32AQI
202441AQI
Highest AQI recorded in
April54AQI
Lowest AQI recorded in
October33AQI
202346AQI
Highest AQI recorded in
March59AQI
Lowest AQI recorded in
August31AQI
202242AQI
Highest AQI recorded in
March50AQI
Lowest AQI recorded in
December33AQI
202142AQI
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
April37AQI
202042AQI
Highest AQI recorded in
August59AQI
Lowest AQI recorded in
September29AQI
Most & Least Polluted Years Over the Last 6 Years
Yakage's annual 2025 AQI (48) shows an average percentage change of 13.6% (worsened AQI) compared to previous years: 2020 (42), 2021 (42), 2022 (42), 2023 (46), 2024 (41).