Otsu, Shiga, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Otsu, Shiga, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 20 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Jun - 3rd Jun 2026
Otsu, Shiga, Japan
4 AM2nd Jun 2026
6 PM
3 AM3rd Jun 2026
37AQI
11AQI
16AQI
13AQI
In the last 24 hours,
Otsu's AQI reached its highest point of 37 at 10 AM during the Day, while the lowest point, 11, was recorded at 3 PM during the Day between 2nd Jun and 3rd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Otsu, Shiga, Japan
14°C9/20°C
16°C13/21°C
19°C13/25°C
17°C12/22°C
14°C11/19°C
15°C9/22°C
18°C12/24°C
19°C15/23°C
19°C15/24°C
18°C14/25°C
19°C13/26°C
21°C15/27°C
20°C14/28°C
22°C15/30°C
23°C16/30°C
21°C17/27°C
21°C20/21°C
19°C16/21°C
17°C16/19°C
19°C16/24°C
22°C16/28°C
22°C17/27°C
20°C18/21°C
22°C19/26°C
20°C14/24°C
21°C12/28°C
23°C18/29°C
23°C17/30°C
19°C17/20°C
19°C17/20°C
48AQI
36AQI
44AQI
35AQI
2026 Days Vs Air Quality
Otsu, Shiga, Japan
75%
116
25%
38
Total number of days with different AQI categories in last 154 days in 2026 (211 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2026, 75% of 154 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)
31AQI (US)
41AQI (US)
52AQI (US)
39AQI (US)
42AQI (US)
25AQI (US)
No. of days
202641AQI (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) (41) shows an average percentage change of 2.3% (worsened AQI (US)) compared to previous years: 2020 (38), 2021 (38), 2022 (42), 2023 (42), 2024 (38), 2025 (43).