Onukimachi, Nobeoka, Miyazaki, 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
Onukimachi, Nobeoka, Miyazaki, 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 32 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: 24th Sep - 25th Sep 2025
Onukimachi, Nobeoka, Miyazaki, Japan
5 AM24th Sep 2025
6 PM
4 AM25th Sep 2025
44AQI
29AQI
30AQI
22AQI
In the last 24 hours,
Onukimachi's AQI reached its highest point of 44 at 3 PM during the Day, while the lowest point, 22, was recorded at 8 PM during the Night between 24th Sep and 25th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Onukimachi, Nobeoka, Miyazaki, Japan
26°C23/29°C
26°C23/30°C
26°C22/29°C
26°C23/30°C
26°C23/31°C
26°C23/30°C
27°C24/31°C
27°C23/31°C
26°C22/30°C
25°C24/26°C
27°C24/32°C
26°C23/31°C
27°C22/32°C
27°C23/31°C
27°C23/31°C
26°C23/30°C
25°C23/28°C
25°C21/29°C
27°C23/31°C
27°C24/31°C
26°C23/31°C
26°C23/30°C
26°C23/30°C
26°C21/30°C
25°C23/28°C
26°C22/30°C
25°C22/28°C
22°C21/25°C
24°C22/25°C
25°C24/25°C
--°C/°C
35AQI
27AQI
38AQI
32AQI
2025 Days Vs Air Quality
Onukimachi, Nobeoka, Miyazaki, Japan
83%
222
17%
45
Total number of days with different AQI categories in last 268 days in 2025 (97 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 268 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
Onukimachi, Nobeoka, Miyazaki, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
33AQI
34AQI
31AQI
32AQI
44AQI
31AQI
37AQI
30AQI
30AQI
28AQI
35AQI
40AQI
41AQI
42AQI
35AQI
39AQI
35AQI
40AQI
37AQI
57AQI
54AQI
61AQI
63AQI
46AQI
42AQI
36AQI
33AQI
31AQI
34AQI
41AQI
42AQI
33AQI
44AQI
31AQI
37AQI
32AQI
32AQI
30AQI
30AQI
30AQI
36AQI
39AQI
31AQI
35AQI
31AQI
34AQI
44AQI
33AQI
39AQI
33AQI
35AQI
43AQI
36AQI
39AQI
35AQI
36AQI
54AQI
44AQI
64AQI
63AQI
46AQI
33AQI
31AQI
35AQI
33AQI
38AQI
38AQI
38AQI
31AQI
39AQI
49AQI
39AQI
35AQI
23AQI
46AQI
35AQI
38AQI
45AQI
54AQI
58AQI
65AQI
57AQI
67AQI
68AQI
54AQI
53AQI
52AQI
42AQI
40AQI
41AQI
32AQI
34AQI
36AQI
41AQI
48AQI
40AQI
39AQI
53AQI
50AQI
56AQI
54AQI
43AQI
53AQI
28AQI
44AQI
46AQI
54AQI
48AQI
35AQI
39AQI
32AQI
31AQI
37AQI
49AQI
51AQI
50AQI
42AQI
48AQI
49AQI
47AQI
43AQI
48AQI
41AQI
39AQI
29AQI
34AQI
33AQI
34AQI
37AQI
34AQI
48AQI
52AQI
56AQI
51AQI
49AQI
42AQI
45AQI
55AQI
55AQI
32AQI
40AQI
43AQI
35AQI
31AQI
30AQI
35AQI
33AQI
31AQI
37AQI
37AQI
45AQI
46AQI
28AQI
44AQI
41AQI
53AQI
53AQI
53AQI
31AQI
28AQI
30AQI
41AQI
44AQI
32AQI
30AQI
29AQI
30AQI
37AQI
37AQI
45AQI
44AQI
33AQI
32AQI
32AQI
35AQI
39AQI
39AQI
41AQI
42AQI
46AQI
51AQI
61AQI
80AQI
82AQI
83AQI
69AQI
65AQI
67AQI
69AQI
62AQI
54AQI
53AQI
49AQI
47AQI
54AQI
53AQI
48AQI
46AQI
41AQI
36AQI
31AQI
30AQI
28AQI
26AQI
31AQI
31AQI
33AQI
28AQI
25AQI
22AQI
31AQI
42AQI
47AQI
48AQI
48AQI
46AQI
45AQI
40AQI
37AQI
34AQI
40AQI
29AQI
34AQI
40AQI
42AQI
42AQI
41AQI
41AQI
45AQI
52AQI
43AQI
44AQI
46AQI
44AQI
41AQI
42AQI
39AQI
37AQI
41AQI
47AQI
47AQI
41AQI
38AQI
36AQI
33AQI
28AQI
24AQI
29AQI
33AQI
27AQI
28AQI
26AQI
30AQI
28AQI
31AQI
28AQI
35AQI
45AQI
39AQI
28AQI
34AQI
45AQI
30AQI
37AQI
26AQI
32AQI
39AQI
36AQI
45AQI
43AQI
41AQI
39AQI
48AQI
42AQI
32AQI
No. of days
202541AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
September32AQI
202437AQI
Highest AQI recorded in
September48AQI
Lowest AQI recorded in
July27AQI
202339AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
August32AQI
202239AQI
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
August17AQI
202136AQI
Highest AQI recorded in
May43AQI
Lowest AQI recorded in
July29AQI
202039AQI
Highest AQI recorded in
August55AQI
Lowest AQI recorded in
July27AQI
Most & Least Polluted Years Over the Last 6 Years
Onukimachi's annual 2025 AQI (41) shows an average percentage change of 7.6% (worsened AQI) compared to previous years: 2020 (39), 2021 (36), 2022 (39), 2023 (39), 2024 (37).