Ureshinomachi Shimojuku, Saga, 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
Ureshinomachi Shimojuku, Saga, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 25 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: 17th Sep - 18th Sep 2025
Ureshinomachi Shimojuku, Saga, Japan
5 AM17th Sep 2025
6 PM
4 AM18th Sep 2025
AQI
AQI
29AQI
16AQI
In the last 24 hours,
Ureshinomachi Shimojuku's AQI reached its highest point of 29 at 5 AM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ureshinomachi Shimojuku, Saga, Japan
27°C23/33°C
28°C24/33°C
27°C24/34°C
27°C23/32°C
27°C23/32°C
28°C23/33°C
28°C24/33°C
27°C24/32°C
27°C23/32°C
27°C23/32°C
28°C25/34°C
28°C24/34°C
27°C24/32°C
27°C23/32°C
27°C24/31°C
28°C23/33°C
27°C24/31°C
27°C23/32°C
28°C23/33°C
28°C24/32°C
28°C24/32°C
27°C24/32°C
25°C24/29°C
26°C22/30°C
26°C23/31°C
26°C24/29°C
27°C24/31°C
27°C24/32°C
27°C24/32°C
--°C/°C
--°C/°C
38AQI
29AQI
39AQI
35AQI
2025 Days Vs Air Quality
Ureshinomachi Shimojuku, Saga, Japan
80%
208
20%
51
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 80%
Health Risk Level:
Low
In 2025, 80% of 260 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
Ureshinomachi Shimojuku, Saga, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
43AQI
35AQI
36AQI
36AQI
55AQI
31AQI
40AQI
29AQI
32AQI
30AQI
35AQI
40AQI
46AQI
45AQI
42AQI
51AQI
50AQI
51AQI
57AQI
70AQI
73AQI
66AQI
70AQI
45AQI
44AQI
42AQI
36AQI
34AQI
37AQI
44AQI
42AQI
35AQI
46AQI
32AQI
41AQI
32AQI
36AQI
31AQI
30AQI
31AQI
39AQI
41AQI
33AQI
40AQI
31AQI
39AQI
41AQI
35AQI
35AQI
33AQI
33AQI
39AQI
36AQI
37AQI
36AQI
44AQI
58AQI
57AQI
57AQI
38AQI
42AQI
30AQI
32AQI
30AQI
36AQI
39AQI
44AQI
47AQI
48AQI
51AQI
54AQI
40AQI
32AQI
31AQI
49AQI
46AQI
44AQI
54AQI
55AQI
64AQI
61AQI
53AQI
62AQI
59AQI
51AQI
62AQI
53AQI
41AQI
43AQI
44AQI
35AQI
37AQI
37AQI
43AQI
43AQI
41AQI
39AQI
54AQI
45AQI
58AQI
52AQI
52AQI
56AQI
34AQI
49AQI
43AQI
50AQI
45AQI
41AQI
40AQI
33AQI
26AQI
35AQI
49AQI
47AQI
50AQI
43AQI
51AQI
51AQI
45AQI
42AQI
44AQI
42AQI
44AQI
41AQI
38AQI
47AQI
35AQI
40AQI
50AQI
54AQI
58AQI
59AQI
57AQI
62AQI
39AQI
52AQI
52AQI
41AQI
31AQI
36AQI
42AQI
27AQI
34AQI
38AQI
44AQI
50AQI
53AQI
46AQI
44AQI
50AQI
52AQI
37AQI
45AQI
46AQI
51AQI
64AQI
63AQI
37AQI
32AQI
43AQI
39AQI
34AQI
27AQI
27AQI
30AQI
30AQI
32AQI
34AQI
29AQI
25AQI
22AQI
19AQI
21AQI
23AQI
28AQI
28AQI
27AQI
29AQI
44AQI
60AQI
66AQI
63AQI
65AQI
52AQI
46AQI
44AQI
53AQI
58AQI
55AQI
44AQI
40AQI
42AQI
37AQI
44AQI
50AQI
50AQI
32AQI
34AQI
30AQI
39AQI
44AQI
46AQI
35AQI
28AQI
25AQI
24AQI
25AQI
26AQI
29AQI
29AQI
45AQI
50AQI
51AQI
45AQI
43AQI
45AQI
47AQI
38AQI
34AQI
38AQI
31AQI
36AQI
38AQI
39AQI
41AQI
42AQI
42AQI
49AQI
50AQI
41AQI
42AQI
48AQI
43AQI
38AQI
36AQI
35AQI
37AQI
43AQI
44AQI
48AQI
46AQI
37AQI
38AQI
41AQI
27AQI
28AQI
33AQI
36AQI
28AQI
28AQI
27AQI
33AQI
33AQI
30AQI
28AQI
27AQI
25AQI
44AQI
38AQI
47AQI
44AQI
45AQI
36AQI
42AQI
42AQI
31AQI
No. of days
202542AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
September31AQI
202439AQI
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
July21AQI
202344AQI
Highest AQI recorded in
April55AQI
Lowest AQI recorded in
August34AQI
202243AQI
Highest AQI recorded in
May53AQI
Lowest AQI recorded in
August36AQI
202143AQI
Highest AQI recorded in
May52AQI
Lowest AQI recorded in
August29AQI
202044AQI
Highest AQI recorded in
May54AQI
Lowest AQI recorded in
July28AQI
Most & Least Polluted Years Over the Last 6 Years
Ureshinomachi Shimojuku's annual 2025 AQI (42) shows an average percentage change of -1.5% (improved AQI) compared to previous years: 2020 (44), 2021 (43), 2022 (43), 2023 (44), 2024 (39).