Shindenmachi, Shimabara, Nagasaki, 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
Shindenmachi, Shimabara, Nagasaki, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 63 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Oct - 6th Oct 2025
Shindenmachi, Shimabara, Nagasaki, Japan
6 AM5th Oct 2025
6 PM
5 AM6th Oct 2025
AQI
AQI
57AQI
34AQI
In the last 24 hours,
Shindenmachi's AQI reached its highest point of 57 at 6 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 5th Oct and 6th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Shindenmachi, Shimabara, Nagasaki, Japan
28°C26/29°C
28°C26/29°C
28°C26/29°C
28°C27/29°C
26°C25/27°C
27°C25/29°C
27°C25/29°C
27°C25/27°C
27°C26/28°C
28°C26/30°C
28°C26/29°C
28°C26/28°C
27°C26/28°C
26°C23/27°C
26°C25/27°C
25°C23/26°C
24°C22/25°C
25°C23/27°C
25°C24/27°C
26°C25/27°C
26°C24/27°C
23°C21/24°C
24°C23/26°C
25°C23/26°C
24°C21/26°C
24°C22/26°C
24°C21/26°C
23°C21/24°C
25°C23/26°C
--°C/°C
--°C/°C
33AQI
29AQI
34AQI
30AQI
2025 Days Vs Air Quality
Shindenmachi, Shimabara, Nagasaki, Japan
79%
220
21%
57
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 278 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
Shindenmachi, Shimabara, Nagasaki, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
40AQI
37AQI
34AQI
32AQI
52AQI
31AQI
39AQI
29AQI
37AQI
29AQI
38AQI
43AQI
46AQI
48AQI
43AQI
55AQI
57AQI
60AQI
60AQI
84AQI
78AQI
76AQI
81AQI
49AQI
47AQI
43AQI
38AQI
35AQI
35AQI
46AQI
41AQI
37AQI
48AQI
31AQI
40AQI
31AQI
36AQI
39AQI
35AQI
41AQI
47AQI
44AQI
39AQI
41AQI
39AQI
38AQI
44AQI
36AQI
39AQI
37AQI
37AQI
44AQI
38AQI
42AQI
41AQI
44AQI
69AQI
59AQI
58AQI
41AQI
43AQI
31AQI
34AQI
33AQI
35AQI
43AQI
45AQI
49AQI
43AQI
50AQI
54AQI
38AQI
34AQI
30AQI
48AQI
43AQI
38AQI
52AQI
53AQI
63AQI
60AQI
49AQI
62AQI
60AQI
51AQI
61AQI
56AQI
48AQI
52AQI
50AQI
38AQI
42AQI
42AQI
44AQI
48AQI
43AQI
36AQI
55AQI
42AQI
59AQI
52AQI
51AQI
56AQI
34AQI
51AQI
44AQI
48AQI
52AQI
38AQI
44AQI
31AQI
28AQI
35AQI
46AQI
48AQI
52AQI
42AQI
51AQI
53AQI
44AQI
41AQI
40AQI
40AQI
41AQI
36AQI
39AQI
47AQI
31AQI
39AQI
48AQI
53AQI
58AQI
60AQI
57AQI
61AQI
40AQI
43AQI
52AQI
41AQI
29AQI
35AQI
43AQI
30AQI
33AQI
39AQI
46AQI
51AQI
49AQI
45AQI
44AQI
50AQI
52AQI
32AQI
48AQI
47AQI
51AQI
59AQI
65AQI
34AQI
30AQI
36AQI
38AQI
40AQI
29AQI
28AQI
33AQI
28AQI
31AQI
33AQI
29AQI
24AQI
17AQI
17AQI
23AQI
24AQI
23AQI
26AQI
26AQI
29AQI
46AQI
68AQI
93AQI
74AQI
81AQI
63AQI
50AQI
49AQI
57AQI
65AQI
51AQI
39AQI
38AQI
40AQI
36AQI
45AQI
54AQI
53AQI
33AQI
34AQI
30AQI
30AQI
44AQI
44AQI
33AQI
26AQI
24AQI
22AQI
22AQI
24AQI
25AQI
28AQI
44AQI
46AQI
46AQI
40AQI
41AQI
44AQI
46AQI
37AQI
33AQI
39AQI
31AQI
35AQI
38AQI
41AQI
39AQI
41AQI
38AQI
49AQI
49AQI
40AQI
43AQI
52AQI
43AQI
36AQI
35AQI
33AQI
38AQI
41AQI
44AQI
49AQI
43AQI
35AQI
34AQI
39AQI
24AQI
29AQI
30AQI
33AQI
26AQI
25AQI
25AQI
32AQI
32AQI
28AQI
29AQI
25AQI
25AQI
24AQI
21AQI
24AQI
25AQI
23AQI
30AQI
29AQI
23AQI
29AQI
43AQI
22AQI
24AQI
25AQI
29AQI
42AQI
49AQI
57AQI
63AQI
47AQI
41AQI
47AQI
45AQI
44AQI
35AQI
44AQI
41AQI
28AQI
53AQI
No. of days
202542AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
September28AQI
202439AQI
Highest AQI recorded in
May50AQI
Lowest AQI recorded in
July24AQI
202342AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
August32AQI
202242AQI
Highest AQI recorded in
May49AQI
Lowest AQI recorded in
August29AQI
202140AQI
Highest AQI recorded in
June47AQI
Lowest AQI recorded in
August32AQI
202040AQI
Highest AQI recorded in
August51AQI
Lowest AQI recorded in
September28AQI
Most & Least Polluted Years Over the Last 6 Years
Shindenmachi's annual 2025 AQI (42) shows an average percentage change of 1.9% (worsened AQI) compared to previous years: 2020 (40), 2021 (40), 2022 (42), 2023 (42), 2024 (39).