Ominecho Higashibun, Nagato, Yamaguchi, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Ominecho Higashibun, Nagato, Yamaguchi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 57 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Ominecho Higashibun, Nagato, Yamaguchi, Japan
6 AM3rd Oct 2025
6 PM
5 AM4th Oct 2025
AQI
AQI
60AQI
50AQI
In the last 24 hours,
Ominecho Higashibun's AQI reached its highest point of 60 at 5 AM during the Night, while the lowest point, 50, was recorded at 8 PM during the Night between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Ominecho Higashibun, Nagato, Yamaguchi, Japan
26°C24/28°C
27°C25/32°C
28°C24/32°C
28°C25/31°C
28°C25/32°C
27°C24/30°C
25°C23/27°C
25°C23/29°C
26°C24/28°C
26°C25/29°C
27°C25/30°C
27°C25/30°C
27°C24/31°C
27°C25/31°C
25°C23/27°C
24°C21/27°C
25°C23/27°C
24°C22/27°C
23°C19/27°C
23°C21/25°C
25°C23/27°C
25°C23/28°C
25°C22/28°C
23°C21/26°C
23°C21/26°C
23°C19/26°C
21°C18/25°C
22°C19/26°C
22°C19/27°C
--°C/°C
--°C/°C
34AQI
30AQI
34AQI
32AQI
2025 Days Vs Air Quality
Ominecho Higashibun, Nagato, Yamaguchi, Japan
74%
204
26%
72
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 74%
Health Risk Level:
Low
In 2025, 74% of 276 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
Ominecho Higashibun, Nagato, Yamaguchi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
44AQI
35AQI
33AQI
30AQI
50AQI
30AQI
39AQI
29AQI
30AQI
30AQI
33AQI
41AQI
48AQI
39AQI
38AQI
44AQI
39AQI
46AQI
49AQI
56AQI
75AQI
71AQI
69AQI
46AQI
41AQI
39AQI
36AQI
32AQI
41AQI
49AQI
46AQI
35AQI
47AQI
33AQI
41AQI
31AQI
39AQI
30AQI
31AQI
32AQI
41AQI
42AQI
34AQI
44AQI
32AQI
44AQI
40AQI
36AQI
36AQI
33AQI
35AQI
39AQI
41AQI
39AQI
39AQI
52AQI
61AQI
64AQI
66AQI
58AQI
45AQI
35AQI
33AQI
35AQI
35AQI
40AQI
43AQI
45AQI
46AQI
52AQI
52AQI
37AQI
34AQI
24AQI
40AQI
40AQI
44AQI
53AQI
57AQI
67AQI
67AQI
62AQI
72AQI
74AQI
65AQI
61AQI
52AQI
43AQI
42AQI
42AQI
37AQI
30AQI
37AQI
43AQI
46AQI
44AQI
44AQI
57AQI
55AQI
57AQI
55AQI
51AQI
47AQI
33AQI
51AQI
50AQI
56AQI
57AQI
44AQI
40AQI
42AQI
27AQI
38AQI
63AQI
51AQI
58AQI
48AQI
51AQI
54AQI
52AQI
47AQI
48AQI
41AQI
44AQI
35AQI
37AQI
40AQI
34AQI
37AQI
47AQI
53AQI
57AQI
60AQI
57AQI
55AQI
43AQI
52AQI
59AQI
59AQI
43AQI
40AQI
46AQI
31AQI
31AQI
32AQI
42AQI
45AQI
43AQI
42AQI
39AQI
47AQI
52AQI
32AQI
45AQI
46AQI
54AQI
60AQI
65AQI
56AQI
35AQI
41AQI
50AQI
46AQI
37AQI
31AQI
33AQI
34AQI
43AQI
46AQI
52AQI
56AQI
65AQI
49AQI
47AQI
44AQI
49AQI
52AQI
46AQI
49AQI
54AQI
62AQI
74AQI
74AQI
75AQI
68AQI
58AQI
57AQI
61AQI
69AQI
72AQI
61AQI
54AQI
48AQI
42AQI
51AQI
56AQI
47AQI
39AQI
36AQI
32AQI
31AQI
31AQI
31AQI
31AQI
28AQI
25AQI
25AQI
27AQI
28AQI
30AQI
32AQI
46AQI
46AQI
48AQI
49AQI
45AQI
46AQI
51AQI
46AQI
40AQI
33AQI
31AQI
33AQI
38AQI
45AQI
47AQI
44AQI
42AQI
47AQI
48AQI
44AQI
38AQI
40AQI
47AQI
46AQI
47AQI
45AQI
48AQI
50AQI
52AQI
51AQI
50AQI
39AQI
37AQI
39AQI
27AQI
24AQI
28AQI
34AQI
33AQI
31AQI
32AQI
31AQI
30AQI
31AQI
34AQI
34AQI
36AQI
32AQI
25AQI
26AQI
29AQI
23AQI
24AQI
25AQI
28AQI
27AQI
28AQI
24AQI
36AQI
37AQI
44AQI
54AQI
48AQI
57AQI
42AQI
40AQI
49AQI
47AQI
45AQI
47AQI
47AQI
45AQI
31AQI
53AQI
No. of days
202544AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
September31AQI
202436AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
July28AQI
202337AQI
Highest AQI recorded in
November39AQI
Lowest AQI recorded in
December37AQI
202234AQI
Highest AQI recorded in
January34AQI
Lowest AQI recorded in
January34AQI
202135AQI
Highest AQI recorded in
June43AQI
Lowest AQI recorded in
August28AQI
202033AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
July25AQI
Most & Least Polluted Years Over the Last 6 Years
Ominecho Higashibun's annual 2025 AQI (44) shows an average percentage change of 26.02% (worsened AQI) compared to previous years: 2020 (33), 2021 (35), 2022 (34), 2023 (37), 2024 (36).