Otemachi, Kudamatsu, Yamaguchi, 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
Otemachi, Kudamatsu, Yamaguchi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (11th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 34 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Otemachi, Kudamatsu, Yamaguchi, Japan
5 AM12th Aug 2025
7 PM
4 AM13th Aug 2025
AQI
AQI
38AQI
15AQI
In the last 24 hours,
Otemachi's AQI reached its highest point of 38 at 2 AM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Otemachi, Kudamatsu, Yamaguchi, Japan
24°C20/26°C
24°C20/29°C
25°C21/29°C
26°C24/29°C
24°C24/25°C
25°C23/28°C
26°C23/29°C
26°C24/29°C
26°C23/30°C
26°C23/30°C
27°C23/31°C
27°C25/31°C
27°C24/32°C
27°C24/31°C
27°C23/30°C
27°C24/30°C
26°C23/30°C
26°C22/31°C
27°C23/31°C
27°C23/32°C
27°C24/32°C
27°C25/29°C
27°C24/31°C
28°C24/32°C
28°C25/31°C
27°C24/30°C
23°C21/25°C
25°C24/26°C
25°C24/25°C
--°C/°C
--°C/°C
42AQI
28AQI
43AQI
35AQI
2025 Days Vs Air Quality
Otemachi, Kudamatsu, Yamaguchi, Japan
73%
162
27%
61
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 224 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
Otemachi, Kudamatsu, Yamaguchi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
35AQI
31AQI
31AQI
29AQI
41AQI
30AQI
35AQI
28AQI
29AQI
27AQI
30AQI
40AQI
46AQI
39AQI
37AQI
39AQI
33AQI
41AQI
43AQI
49AQI
66AQI
70AQI
71AQI
45AQI
42AQI
37AQI
36AQI
31AQI
43AQI
47AQI
51AQI
35AQI
46AQI
32AQI
39AQI
30AQI
37AQI
31AQI
31AQI
31AQI
33AQI
37AQI
30AQI
41AQI
31AQI
41AQI
41AQI
35AQI
36AQI
31AQI
35AQI
37AQI
36AQI
40AQI
36AQI
47AQI
67AQI
59AQI
68AQI
56AQI
44AQI
36AQI
31AQI
33AQI
32AQI
40AQI
39AQI
40AQI
45AQI
52AQI
55AQI
43AQI
37AQI
25AQI
38AQI
36AQI
42AQI
50AQI
56AQI
67AQI
69AQI
60AQI
68AQI
73AQI
55AQI
58AQI
50AQI
43AQI
40AQI
44AQI
36AQI
28AQI
33AQI
40AQI
45AQI
44AQI
44AQI
59AQI
56AQI
60AQI
54AQI
51AQI
47AQI
36AQI
48AQI
49AQI
59AQI
56AQI
39AQI
44AQI
41AQI
29AQI
41AQI
60AQI
55AQI
58AQI
50AQI
50AQI
53AQI
48AQI
43AQI
46AQI
41AQI
42AQI
31AQI
36AQI
40AQI
33AQI
36AQI
42AQI
51AQI
55AQI
59AQI
54AQI
53AQI
44AQI
56AQI
58AQI
57AQI
39AQI
43AQI
46AQI
34AQI
30AQI
34AQI
40AQI
41AQI
43AQI
43AQI
40AQI
46AQI
51AQI
31AQI
45AQI
45AQI
52AQI
57AQI
58AQI
61AQI
36AQI
45AQI
50AQI
48AQI
37AQI
34AQI
35AQI
35AQI
46AQI
46AQI
53AQI
53AQI
46AQI
39AQI
39AQI
39AQI
50AQI
53AQI
49AQI
53AQI
53AQI
57AQI
67AQI
81AQI
78AQI
72AQI
56AQI
58AQI
63AQI
71AQI
79AQI
67AQI
60AQI
49AQI
42AQI
55AQI
55AQI
42AQI
41AQI
37AQI
34AQI
29AQI
29AQI
27AQI
28AQI
29AQI
25AQI
25AQI
26AQI
23AQI
25AQI
30AQI
44AQI
43AQI
45AQI
49AQI
46AQI
43AQI
49AQI
45AQI
38AQI
38AQI
34AQI
40AQI
38AQI
48AQI
47AQI
44AQI
46AQI
47AQI
43AQI
No. of days
202544AQI
Highest AQI recorded in
March48AQI
Lowest AQI recorded in
February38AQI
202438AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
July30AQI
202341AQI
Highest AQI recorded in
April54AQI
Lowest AQI recorded in
August26AQI
202241AQI
Highest AQI recorded in
May52AQI
Lowest AQI recorded in
August26AQI
202141AQI
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
January35AQI
202040AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
December34AQI
Most & Least Polluted Years Over the Last 6 Years
Otemachi's annual 2025 AQI (44) shows an average percentage change of 10.6% (worsened AQI) compared to previous years: 2020 (40), 2021 (41), 2022 (41), 2023 (41), 2024 (38).