Shiromachi, Tsukawaki, Oita, 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
Shiromachi, Tsukawaki, Oita, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th 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 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Shiromachi, Tsukawaki, Oita, Japan
5 AM5th Aug 2025
7 PM
4 AM6th Aug 2025
AQI
AQI
51AQI
36AQI
In the last 24 hours,
Shiromachi's AQI reached its highest point of 51 at 5 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Shiromachi, Tsukawaki, Oita, Japan
28°C22/35°C
28°C23/36°C
28°C23/35°C
27°C22/34°C
27°C24/32°C
27°C23/34°C
27°C23/33°C
23°C21/26°C
24°C20/29°C
25°C21/31°C
27°C22/34°C
23°C22/25°C
25°C21/32°C
27°C21/34°C
27°C23/34°C
28°C22/34°C
28°C22/35°C
28°C22/35°C
27°C22/34°C
27°C23/33°C
27°C22/33°C
27°C21/35°C
28°C21/37°C
28°C22/36°C
28°C21/37°C
29°C23/36°C
29°C23/37°C
29°C23/37°C
27°C24/31°C
--°C/°C
--°C/°C
44AQI
33AQI
45AQI
43AQI
2025 Days Vs Air Quality
Shiromachi, Tsukawaki, Oita, Japan
69%
148
31%
68
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 69%
Health Risk Level:
Moderate
In 2025, 69% of 217 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Shiromachi, Tsukawaki, Oita, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
45AQI
37AQI
41AQI
42AQI
56AQI
33AQI
43AQI
30AQI
36AQI
40AQI
45AQI
50AQI
56AQI
53AQI
56AQI
59AQI
56AQI
60AQI
62AQI
76AQI
79AQI
76AQI
79AQI
51AQI
51AQI
45AQI
38AQI
35AQI
44AQI
53AQI
46AQI
39AQI
50AQI
34AQI
42AQI
33AQI
47AQI
30AQI
36AQI
35AQI
46AQI
57AQI
37AQI
52AQI
34AQI
50AQI
44AQI
41AQI
44AQI
41AQI
42AQI
48AQI
47AQI
41AQI
44AQI
47AQI
67AQI
64AQI
63AQI
53AQI
43AQI
34AQI
30AQI
32AQI
37AQI
44AQI
47AQI
51AQI
46AQI
52AQI
57AQI
39AQI
37AQI
28AQI
52AQI
44AQI
44AQI
55AQI
60AQI
66AQI
69AQI
59AQI
72AQI
70AQI
64AQI
66AQI
57AQI
45AQI
46AQI
45AQI
38AQI
37AQI
40AQI
45AQI
46AQI
45AQI
44AQI
54AQI
49AQI
55AQI
55AQI
48AQI
53AQI
28AQI
46AQI
46AQI
51AQI
55AQI
50AQI
43AQI
40AQI
27AQI
37AQI
51AQI
49AQI
55AQI
48AQI
50AQI
54AQI
50AQI
41AQI
50AQI
40AQI
43AQI
33AQI
37AQI
41AQI
32AQI
38AQI
42AQI
52AQI
54AQI
62AQI
59AQI
60AQI
40AQI
50AQI
56AQI
51AQI
39AQI
37AQI
44AQI
28AQI
30AQI
33AQI
44AQI
45AQI
47AQI
45AQI
43AQI
49AQI
53AQI
32AQI
48AQI
47AQI
60AQI
67AQI
70AQI
39AQI
33AQI
47AQI
43AQI
43AQI
30AQI
28AQI
29AQI
35AQI
39AQI
44AQI
50AQI
39AQI
29AQI
26AQI
29AQI
34AQI
35AQI
37AQI
40AQI
48AQI
58AQI
73AQI
97AQI
92AQI
96AQI
77AQI
59AQI
58AQI
63AQI
73AQI
63AQI
46AQI
47AQI
41AQI
39AQI
48AQI
60AQI
59AQI
37AQI
36AQI
32AQI
33AQI
39AQI
35AQI
28AQI
25AQI
23AQI
22AQI
24AQI
26AQI
25AQI
29AQI
44AQI
47AQI
49AQI
45AQI
50AQI
44AQI
50AQI
46AQI
44AQI
42AQI
49AQI
46AQI
No. of days
202547AQI
Highest AQI recorded in
January50AQI
Lowest AQI recorded in
June42AQI
202443AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
July37AQI
202344AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
August32AQI
202248AQI
Highest AQI recorded in
May57AQI
Lowest AQI recorded in
September39AQI
202146AQI
Highest AQI recorded in
February54AQI
Lowest AQI recorded in
August32AQI
202049AQI
Highest AQI recorded in
March68AQI
Lowest AQI recorded in
July32AQI
Most & Least Polluted Years Over the Last 6 Years
Shiromachi's annual 2025 AQI (47) shows an average percentage change of 1.4% (worsened AQI) compared to previous years: 2020 (49), 2021 (46), 2022 (48), 2023 (44), 2024 (43).