Otsu, Shiga, 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
Otsu, Shiga, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (6th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 23 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 5th Aug - 6th Aug 2026
Otsu, Shiga, Japan
4 AM5th Aug 2026
7 PM
3 AM6th Aug 2026
33AQI
22AQI
24AQI
22AQI
In the last 24 hours,
Otsu's AQI reached its highest point of 33 at 1 PM during the Day, while the lowest point, 22, was recorded at 3 AM during the Night between 5th Aug and 6th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Otsu, Shiga, Japan
24°C21/29°C
25°C21/31°C
26°C21/32°C
26°C22/32°C
27°C23/33°C
28°C24/33°C
29°C23/34°C
29°C24/34°C
28°C25/32°C
29°C23/35°C
29°C26/33°C
29°C24/33°C
30°C25/35°C
30°C26/36°C
31°C26/37°C
31°C26/37°C
31°C25/37°C
30°C25/36°C
29°C24/36°C
29°C25/35°C
27°C24/33°C
27°C23/31°C
30°C25/36°C
29°C24/35°C
29°C24/35°C
29°C25/34°C
29°C25/34°C
28°C25/32°C
28°C23/33°C
28°C25/33°C
44AQI
38AQI
38AQI
38AQI
2026 Days Vs Air Quality
Otsu, Shiga, Japan
79%
173
21%
45
Total number of days with different AQI categories in last 218 days in 2026 (147 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2026, 79% of 218 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
Otsu, Shiga, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
16AQI (US)
14AQI (US)
24AQI (US)
42AQI (US)
19AQI (US)
30AQI (US)
32AQI (US)
18AQI (US)
29AQI (US)
23AQI (US)
25AQI (US)
34AQI (US)
21AQI (US)
43AQI (US)
55AQI (US)
65AQI (US)
49AQI (US)
46AQI (US)
27AQI (US)
13AQI (US)
23AQI (US)
41AQI (US)
47AQI (US)
28AQI (US)
26AQI (US)
41AQI (US)
25AQI (US)
22AQI (US)
34AQI (US)
32AQI (US)
38AQI (US)
49AQI (US)
32AQI (US)
39AQI (US)
56AQI (US)
46AQI (US)
14AQI (US)
13AQI (US)
36AQI (US)
43AQI (US)
43AQI (US)
54AQI (US)
60AQI (US)
67AQI (US)
50AQI (US)
48AQI (US)
16AQI (US)
23AQI (US)
33AQI (US)
34AQI (US)
57AQI (US)
41AQI (US)
55AQI (US)
56AQI (US)
27AQI (US)
15AQI (US)
45AQI (US)
46AQI (US)
42AQI (US)
81AQI (US)
45AQI (US)
55AQI (US)
55AQI (US)
53AQI (US)
47AQI (US)
45AQI (US)
49AQI (US)
58AQI (US)
55AQI (US)
64AQI (US)
43AQI (US)
46AQI (US)
61AQI (US)
59AQI (US)
52AQI (US)
57AQI (US)
50AQI (US)
58AQI (US)
47AQI (US)
52AQI (US)
49AQI (US)
66AQI (US)
58AQI (US)
12AQI (US)
39AQI (US)
64AQI (US)
74AQI (US)
55AQI (US)
24AQI (US)
23AQI (US)
45AQI (US)
54AQI (US)
42AQI (US)
20AQI (US)
37AQI (US)
43AQI (US)
33AQI (US)
36AQI (US)
47AQI (US)
36AQI (US)
34AQI (US)
33AQI (US)
43AQI (US)
37AQI (US)
34AQI (US)
40AQI (US)
30AQI (US)
36AQI (US)
38AQI (US)
40AQI (US)
46AQI (US)
36AQI (US)
32AQI (US)
46AQI (US)
50AQI (US)
49AQI (US)
46AQI (US)
44AQI (US)
28AQI (US)
45AQI (US)
52AQI (US)
54AQI (US)
23AQI (US)
23AQI (US)
30AQI (US)
31AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
34AQI (US)
42AQI (US)
37AQI (US)
37AQI (US)
83AQI (US)
67AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
61AQI (US)
64AQI (US)
56AQI (US)
60AQI (US)
50AQI (US)
40AQI (US)
24AQI (US)
25AQI (US)
25AQI (US)
25AQI (US)
28AQI (US)
30AQI (US)
26AQI (US)
20AQI (US)
25AQI (US)
22AQI (US)
24AQI (US)
21AQI (US)
21AQI (US)
23AQI (US)
22AQI (US)
25AQI (US)
41AQI (US)
29AQI (US)
25AQI (US)
23AQI (US)
28AQI (US)
24AQI (US)
20AQI (US)
30AQI (US)
22AQI (US)
21AQI (US)
19AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
44AQI (US)
58AQI (US)
13AQI (US)
26AQI (US)
25AQI (US)
19AQI (US)
15AQI (US)
21AQI (US)
25AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
27AQI (US)
59AQI (US)
47AQI (US)
56AQI (US)
42AQI (US)
43AQI (US)
68AQI (US)
78AQI (US)
59AQI (US)
39AQI (US)
46AQI (US)
41AQI (US)
29AQI (US)
35AQI (US)
39AQI (US)
54AQI (US)
40AQI (US)
47AQI (US)
45AQI (US)
49AQI (US)
27AQI (US)
26AQI (US)
23AQI (US)
31AQI (US)
41AQI (US)
52AQI (US)
39AQI (US)
42AQI (US)
25AQI (US)
38AQI (US)
36AQI (US)
No. of days
202638AQI (US)
Highest AQI (US) recorded in
March52AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202543AQI (US)
Highest AQI (US) recorded in
July54AQI (US)
Lowest AQI (US) recorded in
September34AQI (US)
202438AQI (US)
Highest AQI (US) recorded in
April51AQI (US)
Lowest AQI (US) recorded in
December32AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
April50AQI (US)
Lowest AQI (US) recorded in
August34AQI (US)
202242AQI (US)
Highest AQI (US) recorded in
May51AQI (US)
Lowest AQI (US) recorded in
December35AQI (US)
202138AQI (US)
Highest AQI (US) recorded in
June46AQI (US)
Lowest AQI (US) recorded in
January33AQI (US)
202038AQI (US)
Highest AQI (US) recorded in
August56AQI (US)
Lowest AQI (US) recorded in
December33AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Otsu's annual 2026 AQI (US) (38) shows an average percentage change of -5.1% (improved AQI (US)) compared to previous years: 2020 (38), 2021 (38), 2022 (42), 2023 (42), 2024 (38), 2025 (43).