Asahimachi, Yashima, Kumamoto, 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
Asahimachi, Yashima, Kumamoto, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 45 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Asahimachi, Yashima, Kumamoto, Japan
5 AM3rd Aug 2025
7 PM
4 AM4th Aug 2025
60AQI
42AQI
51AQI
41AQI
In the last 24 hours,
Asahimachi's AQI reached its highest point of 60 at 12 PM during the Day, while the lowest point, 41, was recorded at 2 AM during the Night between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Asahimachi, Yashima, Kumamoto, Japan
27°C24/31°C
27°C24/32°C
28°C24/32°C
28°C25/31°C
28°C24/34°C
28°C24/32°C
29°C26/33°C
29°C25/33°C
28°C25/33°C
26°C23/28°C
26°C23/30°C
26°C22/30°C
27°C24/32°C
24°C24/25°C
27°C22/32°C
28°C23/32°C
28°C24/32°C
28°C24/33°C
28°C24/34°C
29°C24/34°C
28°C25/34°C
29°C25/33°C
29°C26/33°C
29°C24/35°C
29°C24/34°C
29°C24/35°C
28°C23/34°C
29°C25/34°C
29°C25/35°C
28°C25/32°C
--°C/°C
45AQI
32AQI
45AQI
40AQI
2025 Days Vs Air Quality
Asahimachi, Yashima, Kumamoto, Japan
77%
166
22%
48
0.4%
1
Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)
Under WHO’s Safe Air Quality Limits: 77%
Health Risk Level:
Low
In 2025, 77% of 216 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
Asahimachi, Yashima, Kumamoto, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
37AQI
40AQI
33AQI
38AQI
37AQI
46AQI
31AQI
41AQI
29AQI
33AQI
29AQI
35AQI
44AQI
44AQI
49AQI
44AQI
52AQI
52AQI
59AQI
52AQI
75AQI
75AQI
75AQI
78AQI
52AQI
45AQI
39AQI
37AQI
34AQI
36AQI
44AQI
45AQI
34AQI
51AQI
34AQI
42AQI
32AQI
38AQI
34AQI
32AQI
29AQI
42AQI
43AQI
36AQI
40AQI
31AQI
38AQI
45AQI
35AQI
39AQI
35AQI
35AQI
42AQI
40AQI
40AQI
38AQI
39AQI
64AQI
55AQI
53AQI
48AQI
40AQI
31AQI
30AQI
31AQI
36AQI
42AQI
45AQI
50AQI
46AQI
50AQI
57AQI
42AQI
36AQI
32AQI
50AQI
44AQI
40AQI
49AQI
54AQI
62AQI
61AQI
46AQI
59AQI
56AQI
51AQI
57AQI
54AQI
46AQI
48AQI
45AQI
42AQI
43AQI
43AQI
45AQI
46AQI
42AQI
41AQI
52AQI
44AQI
55AQI
52AQI
48AQI
56AQI
36AQI
52AQI
45AQI
48AQI
51AQI
40AQI
45AQI
38AQI
33AQI
37AQI
48AQI
48AQI
47AQI
43AQI
50AQI
51AQI
46AQI
42AQI
40AQI
40AQI
42AQI
38AQI
40AQI
48AQI
38AQI
40AQI
46AQI
52AQI
55AQI
58AQI
55AQI
62AQI
40AQI
48AQI
52AQI
40AQI
35AQI
37AQI
45AQI
38AQI
37AQI
40AQI
43AQI
50AQI
45AQI
45AQI
42AQI
50AQI
49AQI
34AQI
45AQI
45AQI
49AQI
58AQI
64AQI
34AQI
32AQI
37AQI
39AQI
45AQI
31AQI
33AQI
34AQI
31AQI
34AQI
35AQI
36AQI
31AQI
26AQI
21AQI
31AQI
28AQI
24AQI
30AQI
31AQI
36AQI
53AQI
71AQI
102AQI
88AQI
90AQI
71AQI
55AQI
55AQI
60AQI
67AQI
49AQI
42AQI
40AQI
40AQI
35AQI
43AQI
58AQI
53AQI
35AQI
33AQI
35AQI
28AQI
41AQI
42AQI
27AQI
26AQI
22AQI
23AQI
23AQI
24AQI
24AQI
29AQI
46AQI
49AQI
45AQI
46AQI
40AQI
47AQI
46AQI
44AQI
38AQI
46AQI
47AQI
No. of days
202544AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
June38AQI
202444AQI
Highest AQI recorded in
January65AQI
Lowest AQI recorded in
July34AQI
202346AQI
Highest AQI recorded in
April55AQI
Lowest AQI recorded in
August32AQI
202249AQI
Highest AQI recorded in
August72AQI
Lowest AQI recorded in
July42AQI
202145AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
August30AQI
202050AQI
Highest AQI recorded in
August60AQI
Lowest AQI recorded in
July32AQI
Most & Least Polluted Years Over the Last 6 Years
Asahimachi's annual 2025 AQI (44) shows an average percentage change of -6.3% (improved AQI) compared to previous years: 2020 (50), 2021 (45), 2022 (49), 2023 (46), 2024 (44).