Minamiozuma, Nagano, 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
Minamiozuma, Nagano, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (19th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 47 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Aug - 21st Aug 2025
Minamiozuma, Nagano, Japan
4 AM20th Aug 2025
6 PM
3 AM21st Aug 2025
AQI
AQI
77AQI
43AQI
In the last 24 hours,
Minamiozuma's AQI reached its highest point of 77 at 4 PM during the Night, while the lowest point, 43, was recorded at 2 AM during the Night between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Minamiozuma, Nagano, Japan
23°C16/32°C
23°C15/32°C
22°C15/32°C
22°C15/32°C
22°C15/33°C
23°C15/32°C
23°C16/32°C
24°C16/34°C
24°C16/33°C
23°C15/33°C
22°C14/31°C
24°C17/33°C
24°C17/34°C
24°C17/34°C
25°C17/36°C
24°C18/32°C
21°C15/30°C
20°C13/29°C
21°C13/30°C
19°C16/22°C
19°C17/24°C
19°C17/21°C
22°C18/28°C
22°C16/30°C
22°C15/30°C
22°C15/31°C
23°C16/32°C
22°C15/32°C
22°C15/34°C
--°C/°C
--°C/°C
45AQI
45AQI
43AQI
43AQI
2025 Days Vs Air Quality
Minamiozuma, Nagano, Japan
85%
197
15%
34
Total number of days with different AQI categories in last 232 days in 2025 (133 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 232 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
Minamiozuma, Nagano, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
32AQI
29AQI
30AQI
32AQI
35AQI
32AQI
28AQI
29AQI
27AQI
31AQI
34AQI
35AQI
34AQI
32AQI
30AQI
30AQI
36AQI
35AQI
42AQI
45AQI
49AQI
54AQI
51AQI
40AQI
37AQI
33AQI
32AQI
33AQI
32AQI
35AQI
45AQI
40AQI
39AQI
34AQI
33AQI
31AQI
35AQI
30AQI
31AQI
31AQI
31AQI
31AQI
32AQI
35AQI
30AQI
47AQI
45AQI
40AQI
36AQI
32AQI
31AQI
32AQI
34AQI
33AQI
36AQI
39AQI
47AQI
46AQI
53AQI
46AQI
40AQI
37AQI
38AQI
35AQI
36AQI
39AQI
36AQI
40AQI
33AQI
33AQI
44AQI
44AQI
45AQI
32AQI
30AQI
30AQI
24AQI
30AQI
45AQI
49AQI
60AQI
61AQI
77AQI
87AQI
72AQI
44AQI
40AQI
38AQI
34AQI
36AQI
26AQI
24AQI
24AQI
32AQI
26AQI
35AQI
41AQI
29AQI
43AQI
38AQI
46AQI
26AQI
30AQI
21AQI
27AQI
48AQI
51AQI
69AQI
54AQI
44AQI
48AQI
28AQI
28AQI
35AQI
44AQI
45AQI
46AQI
39AQI
54AQI
46AQI
35AQI
37AQI
35AQI
40AQI
29AQI
29AQI
32AQI
31AQI
25AQI
23AQI
26AQI
38AQI
46AQI
47AQI
51AQI
34AQI
43AQI
42AQI
62AQI
63AQI
56AQI
56AQI
51AQI
30AQI
32AQI
33AQI
31AQI
37AQI
26AQI
22AQI
21AQI
33AQI
25AQI
30AQI
35AQI
42AQI
45AQI
56AQI
58AQI
37AQI
33AQI
41AQI
47AQI
37AQI
28AQI
29AQI
35AQI
44AQI
50AQI
53AQI
52AQI
53AQI
41AQI
39AQI
40AQI
37AQI
41AQI
43AQI
47AQI
51AQI
55AQI
47AQI
47AQI
51AQI
56AQI
54AQI
56AQI
59AQI
59AQI
57AQI
47AQI
47AQI
48AQI
45AQI
38AQI
45AQI
36AQI
37AQI
36AQI
36AQI
38AQI
40AQI
42AQI
41AQI
39AQI
38AQI
38AQI
40AQI
47AQI
46AQI
41AQI
43AQI
47AQI
48AQI
57AQI
53AQI
49AQI
41AQI
38AQI
40AQI
36AQI
36AQI
38AQI
39AQI
45AQI
50AQI
48AQI
45AQI
48AQI
47AQI
35AQI
36AQI
44AQI
38AQI
38AQI
41AQI
45AQI
45AQI
No. of days
202540AQI
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
January35AQI
202435AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
October30AQI
202338AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
October29AQI
202239AQI
Highest AQI recorded in
May45AQI
Lowest AQI recorded in
August20AQI
202133AQI
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
January26AQI
202032AQI
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
July24AQI
Most & Least Polluted Years Over the Last 6 Years
Minamiozuma's annual 2025 AQI (40) shows an average percentage change of 13.2% (worsened AQI) compared to previous years: 2020 (32), 2021 (33), 2022 (39), 2023 (38), 2024 (35).