Chayamachi Hayaoki, Hayashima, 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
Chayamachi Hayaoki, Hayashima, Okayama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (23rd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 32 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 24th Sep - 25th Sep 2025
Chayamachi Hayaoki, Hayashima, Okayama, Japan
5 AM24th Sep 2025
6 PM
4 AM25th Sep 2025
AQI
AQI
39AQI
24AQI
In the last 24 hours,
Chayamachi Hayaoki's AQI reached its highest point of 39 at 12 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 24th Sep and 25th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Chayamachi Hayaoki, Hayashima, Okayama, Japan
28°C26/31°C
28°C25/31°C
28°C25/31°C
28°C26/32°C
29°C26/32°C
29°C26/32°C
29°C26/33°C
29°C26/32°C
28°C25/32°C
25°C24/26°C
27°C25/32°C
27°C24/31°C
28°C26/31°C
28°C25/31°C
28°C25/31°C
26°C24/29°C
26°C23/29°C
26°C23/30°C
27°C24/29°C
27°C26/30°C
28°C25/31°C
28°C26/31°C
28°C26/30°C
26°C22/28°C
24°C21/27°C
25°C23/28°C
24°C20/28°C
23°C19/26°C
21°C21/22°C
--°C/°C
--°C/°C
38AQI
33AQI
37AQI
37AQI
2025 Days Vs Air Quality
Chayamachi Hayaoki, Hayashima, Okayama, Japan
62%
165
37%
99
0.7%
2
Total number of days with different AQI categories in last 267 days in 2025 (98 days remaining)
Under WHO’s Safe Air Quality Limits: 62%
Health Risk Level:
Moderate
In 2025, 62% of 267 days were within WHO’s safe air quality limits, and 38% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Chayamachi Hayaoki, Hayashima, Okayama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
41AQI
34AQI
35AQI
42AQI
54AQI
36AQI
37AQI
31AQI
31AQI
32AQI
34AQI
38AQI
49AQI
42AQI
40AQI
34AQI
37AQI
46AQI
52AQI
50AQI
69AQI
88AQI
77AQI
50AQI
47AQI
40AQI
41AQI
34AQI
46AQI
63AQI
72AQI
49AQI
59AQI
41AQI
42AQI
33AQI
38AQI
32AQI
32AQI
33AQI
35AQI
44AQI
32AQI
47AQI
31AQI
57AQI
41AQI
42AQI
36AQI
36AQI
33AQI
35AQI
33AQI
36AQI
43AQI
41AQI
69AQI
78AQI
102AQI
99AQI
60AQI
49AQI
38AQI
42AQI
38AQI
45AQI
44AQI
45AQI
45AQI
60AQI
54AQI
48AQI
41AQI
27AQI
40AQI
33AQI
38AQI
51AQI
60AQI
68AQI
75AQI
79AQI
79AQI
87AQI
81AQI
55AQI
53AQI
42AQI
37AQI
37AQI
38AQI
25AQI
43AQI
41AQI
55AQI
53AQI
56AQI
69AQI
68AQI
68AQI
57AQI
49AQI
52AQI
33AQI
53AQI
54AQI
63AQI
67AQI
63AQI
46AQI
52AQI
57AQI
46AQI
74AQI
70AQI
67AQI
59AQI
53AQI
63AQI
58AQI
43AQI
54AQI
46AQI
49AQI
34AQI
41AQI
33AQI
41AQI
36AQI
43AQI
55AQI
59AQI
64AQI
52AQI
55AQI
48AQI
56AQI
61AQI
69AQI
58AQI
40AQI
54AQI
43AQI
28AQI
36AQI
39AQI
46AQI
49AQI
43AQI
44AQI
52AQI
80AQI
40AQI
56AQI
53AQI
67AQI
67AQI
73AQI
55AQI
37AQI
53AQI
67AQI
59AQI
42AQI
45AQI
50AQI
46AQI
54AQI
58AQI
60AQI
57AQI
55AQI
48AQI
43AQI
42AQI
49AQI
59AQI
64AQI
59AQI
63AQI
64AQI
92AQI
88AQI
105AQI
90AQI
74AQI
73AQI
72AQI
84AQI
71AQI
60AQI
54AQI
50AQI
43AQI
49AQI
58AQI
38AQI
40AQI
35AQI
34AQI
34AQI
41AQI
36AQI
34AQI
27AQI
25AQI
24AQI
25AQI
34AQI
40AQI
43AQI
45AQI
43AQI
43AQI
58AQI
47AQI
51AQI
48AQI
49AQI
48AQI
45AQI
34AQI
34AQI
40AQI
46AQI
42AQI
42AQI
37AQI
46AQI
43AQI
46AQI
42AQI
40AQI
47AQI
52AQI
53AQI
54AQI
53AQI
50AQI
53AQI
54AQI
53AQI
39AQI
33AQI
42AQI
25AQI
24AQI
26AQI
34AQI
36AQI
33AQI
34AQI
30AQI
30AQI
32AQI
33AQI
41AQI
43AQI
46AQI
29AQI
29AQI
41AQI
25AQI
28AQI
32AQI
45AQI
43AQI
55AQI
54AQI
48AQI
55AQI
53AQI
46AQI
33AQI
No. of days
202549AQI
Highest AQI recorded in
March55AQI
Lowest AQI recorded in
September33AQI
202443AQI
Highest AQI recorded in
April56AQI
Lowest AQI recorded in
August36AQI
202345AQI
Highest AQI recorded in
November55AQI
Lowest AQI recorded in
August28AQI
202244AQI
Highest AQI recorded in
May53AQI
Lowest AQI recorded in
August23AQI
202143AQI
Highest AQI recorded in
November54AQI
Lowest AQI recorded in
August33AQI
202049AQI
Highest AQI recorded in
August72AQI
Lowest AQI recorded in
September37AQI
Most & Least Polluted Years Over the Last 6 Years
Chayamachi Hayaoki's annual 2025 AQI (49) shows an average percentage change of 8.2% (worsened AQI) compared to previous years: 2020 (49), 2021 (43), 2022 (44), 2023 (45), 2024 (43).