Matsue, 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
Matsue, Hayashima, Okayama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 25 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Matsue, Hayashima, Okayama, Japan
5 AM22nd Sep 2025
6 PM
4 AM23rd Sep 2025
AQI
AQI
32AQI
15AQI
In the last 24 hours,
Matsue's AQI reached its highest point of 32 at 9 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Matsue, Hayashima, Okayama, Japan
29°C27/32°C
29°C26/32°C
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
--°C/°C
--°C/°C
40AQI
35AQI
38AQI
38AQI
2025 Days Vs Air Quality
Matsue, Hayashima, Okayama, Japan
57%
151
42%
110
1%
3
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 57%
Health Risk Level:
Considerable
In 2025, 57% of 265 days were within WHO’s safe air quality limits, and 43% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Matsue, Hayashima, Okayama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
44AQI
34AQI
38AQI
39AQI
56AQI
36AQI
39AQI
31AQI
30AQI
35AQI
38AQI
34AQI
49AQI
45AQI
46AQI
37AQI
37AQI
48AQI
57AQI
55AQI
77AQI
92AQI
80AQI
50AQI
48AQI
42AQI
47AQI
36AQI
49AQI
67AQI
73AQI
54AQI
62AQI
43AQI
42AQI
32AQI
43AQI
33AQI
34AQI
37AQI
35AQI
43AQI
32AQI
49AQI
29AQI
63AQI
43AQI
43AQI
39AQI
41AQI
34AQI
37AQI
35AQI
38AQI
47AQI
45AQI
73AQI
87AQI
115AQI
117AQI
63AQI
54AQI
40AQI
42AQI
39AQI
50AQI
50AQI
47AQI
51AQI
65AQI
63AQI
53AQI
43AQI
32AQI
46AQI
39AQI
45AQI
57AQI
70AQI
79AQI
80AQI
90AQI
85AQI
90AQI
86AQI
61AQI
56AQI
45AQI
47AQI
43AQI
50AQI
36AQI
50AQI
44AQI
59AQI
56AQI
61AQI
69AQI
70AQI
75AQI
60AQI
55AQI
56AQI
38AQI
56AQI
61AQI
68AQI
71AQI
65AQI
48AQI
54AQI
64AQI
51AQI
73AQI
71AQI
67AQI
60AQI
55AQI
67AQI
58AQI
46AQI
56AQI
50AQI
51AQI
39AQI
46AQI
32AQI
41AQI
43AQI
49AQI
58AQI
62AQI
71AQI
68AQI
59AQI
54AQI
59AQI
62AQI
69AQI
60AQI
43AQI
52AQI
42AQI
29AQI
34AQI
42AQI
48AQI
48AQI
49AQI
45AQI
54AQI
57AQI
40AQI
59AQI
55AQI
64AQI
65AQI
74AQI
53AQI
41AQI
55AQI
71AQI
60AQI
41AQI
44AQI
50AQI
45AQI
53AQI
57AQI
59AQI
56AQI
56AQI
51AQI
44AQI
43AQI
52AQI
61AQI
65AQI
59AQI
64AQI
63AQI
88AQI
86AQI
104AQI
88AQI
74AQI
71AQI
70AQI
81AQI
72AQI
58AQI
53AQI
51AQI
48AQI
48AQI
58AQI
39AQI
39AQI
35AQI
34AQI
36AQI
44AQI
32AQI
33AQI
27AQI
25AQI
24AQI
25AQI
36AQI
41AQI
46AQI
44AQI
42AQI
43AQI
58AQI
48AQI
50AQI
49AQI
51AQI
50AQI
49AQI
35AQI
33AQI
40AQI
46AQI
42AQI
41AQI
37AQI
45AQI
44AQI
47AQI
42AQI
40AQI
46AQI
51AQI
53AQI
53AQI
53AQI
50AQI
53AQI
54AQI
53AQI
41AQI
34AQI
42AQI
25AQI
26AQI
27AQI
33AQI
36AQI
33AQI
34AQI
30AQI
29AQI
31AQI
33AQI
36AQI
40AQI
46AQI
30AQI
29AQI
44AQI
25AQI
47AQI
45AQI
61AQI
58AQI
50AQI
55AQI
53AQI
47AQI
34AQI
No. of days
202551AQI
Highest AQI recorded in
March61AQI
Lowest AQI recorded in
September34AQI
202445AQI
Highest AQI recorded in
April59AQI
Lowest AQI recorded in
October34AQI
202349AQI
Highest AQI recorded in
March65AQI
Lowest AQI recorded in
August30AQI
202248AQI
Highest AQI recorded in
March62AQI
Lowest AQI recorded in
September34AQI
202146AQI
Highest AQI recorded in
May57AQI
Lowest AQI recorded in
September36AQI
202049AQI
Highest AQI recorded in
August60AQI
Lowest AQI recorded in
September32AQI
Most & Least Polluted Years Over the Last 6 Years
Matsue's annual 2025 AQI (51) shows an average percentage change of 7.4% (worsened AQI) compared to previous years: 2020 (49), 2021 (46), 2022 (48), 2023 (49), 2024 (45).