Fukushima, Ina, 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
Fukushima, Ina, Nagano, 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 56 of Moderate 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
Fukushima, Ina, Nagano, Japan
4 AM5th Aug 2025
7 PM
3 AM6th Aug 2025
AQI
AQI
60AQI
48AQI
In the last 24 hours,
Fukushima's AQI reached its highest point of 60 at 10 AM during the Night, while the lowest point, 48, was recorded at 12 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Fukushima, Ina, Nagano, Japan
20°C15/23°C
20°C15/22°C
19°C12/23°C
22°C13/29°C
22°C17/27°C
22°C18/27°C
23°C19/29°C
20°C16/22°C
18°C13/21°C
17°C11/20°C
16°C12/14°C
17°C9/21°C
18°C11/22°C
20°C12/25°C
20°C14/25°C
20°C14/24°C
20°C13/25°C
21°C12/28°C
21°C17/27°C
19°C13/24°C
19°C12/23°C
20°C13/24°C
21°C13/26°C
22°C13/31°C
20°C12/26°C
20°C11/25°C
21°C14/26°C
20°C14/24°C
20°C14/24°C
--°C/°C
--°C/°C
46AQI
39AQI
46AQI
46AQI
2025 Days Vs Air Quality
Fukushima, Ina, Nagano, Japan
85%
184
15%
32
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 217 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
Fukushima, Ina, Nagano, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
30AQI
30AQI
29AQI
27AQI
33AQI
28AQI
30AQI
30AQI
26AQI
27AQI
26AQI
28AQI
30AQI
32AQI
27AQI
29AQI
28AQI
31AQI
32AQI
34AQI
36AQI
45AQI
55AQI
40AQI
38AQI
31AQI
30AQI
35AQI
31AQI
37AQI
45AQI
53AQI
39AQI
39AQI
35AQI
32AQI
35AQI
31AQI
35AQI
30AQI
33AQI
31AQI
32AQI
32AQI
32AQI
43AQI
43AQI
38AQI
34AQI
31AQI
31AQI
32AQI
33AQI
33AQI
35AQI
36AQI
41AQI
41AQI
43AQI
45AQI
37AQI
35AQI
36AQI
33AQI
37AQI
35AQI
35AQI
37AQI
33AQI
30AQI
42AQI
39AQI
40AQI
32AQI
27AQI
26AQI
22AQI
29AQI
44AQI
49AQI
58AQI
61AQI
73AQI
94AQI
69AQI
51AQI
39AQI
37AQI
29AQI
27AQI
24AQI
22AQI
23AQI
28AQI
27AQI
34AQI
39AQI
27AQI
43AQI
38AQI
42AQI
28AQI
36AQI
21AQI
31AQI
42AQI
52AQI
66AQI
56AQI
43AQI
47AQI
28AQI
30AQI
39AQI
45AQI
47AQI
46AQI
40AQI
51AQI
46AQI
34AQI
34AQI
36AQI
38AQI
30AQI
30AQI
34AQI
31AQI
26AQI
25AQI
31AQI
37AQI
45AQI
49AQI
50AQI
31AQI
47AQI
43AQI
61AQI
64AQI
51AQI
55AQI
49AQI
40AQI
34AQI
32AQI
28AQI
37AQI
25AQI
22AQI
21AQI
33AQI
28AQI
31AQI
35AQI
43AQI
52AQI
56AQI
55AQI
34AQI
28AQI
37AQI
46AQI
53AQI
49AQI
38AQI
39AQI
44AQI
48AQI
53AQI
52AQI
53AQI
41AQI
40AQI
37AQI
34AQI
36AQI
38AQI
40AQI
46AQI
50AQI
48AQI
47AQI
49AQI
56AQI
53AQI
56AQI
57AQI
62AQI
60AQI
51AQI
51AQI
50AQI
47AQI
42AQI
47AQI
40AQI
39AQI
34AQI
34AQI
36AQI
37AQI
42AQI
43AQI
35AQI
31AQI
32AQI
38AQI
45AQI
49AQI
42AQI
44AQI
44AQI
48AQI
56AQI
32AQI
36AQI
42AQI
37AQI
39AQI
41AQI
45AQI
48AQI
No. of days
202539AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
January32AQI
202434AQI
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
January26AQI
202336AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
January28AQI
202234AQI
Highest AQI recorded in
May42AQI
Lowest AQI recorded in
December25AQI
202131AQI
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
January21AQI
202029AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
December17AQI
Most & Least Polluted Years Over the Last 6 Years
Fukushima's annual 2025 AQI (39) shows an average percentage change of 19.5% (worsened AQI) compared to previous years: 2020 (29), 2021 (31), 2022 (34), 2023 (36), 2024 (34).