Ina, Nagano, 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
Ina, Nagano, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th June):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 21 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: 3rd Jun - 4th Jun 2026
Ina, Nagano, Japan
4 AM3rd Jun 2026
6 PM
3 AM4th Jun 2026
27AQI
6AQI
28AQI
16AQI
In the last 24 hours,
Ina's AQI reached its highest point of 28 at 11 PM during the Night, while the lowest point, 6, was recorded at 5 PM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Ina, Nagano, Japan
10°C1/18°C
13°C4/24°C
13°C2/22°C
7°C-2/17°C
8°C-2/19°C
11°C1/21°C
13°C5/22°C
12°C5/19°C
11°C3/21°C
12°C3/23°C
14°C5/24°C
15°C5/26°C
16°C7/27°C
17°C8/28°C
16°C8/26°C
17°C12/18°C
16°C13/21°C
15°C13/19°C
16°C10/22°C
18°C8/27°C
18°C10/25°C
18°C11/25°C
19°C9/28°C
18°C5/26°C
14°C4/25°C
16°C8/25°C
17°C7/27°C
14°C9/21°C
14°C10/20°C
16°C10/21°C
45AQI
33AQI
42AQI
33AQI
2026 Days Vs Air Quality
Ina, Nagano, Japan
88%
137
12%
18
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2026, 88% of 155 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
Ina, Nagano, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI (US)
21AQI (US)
18AQI (US)
23AQI (US)
35AQI (US)
17AQI (US)
28AQI (US)
28AQI (US)
21AQI (US)
35AQI (US)
30AQI (US)
19AQI (US)
22AQI (US)
16AQI (US)
34AQI (US)
34AQI (US)
44AQI (US)
39AQI (US)
50AQI (US)
32AQI (US)
18AQI (US)
20AQI (US)
30AQI (US)
40AQI (US)
42AQI (US)
20AQI (US)
38AQI (US)
26AQI (US)
22AQI (US)
38AQI (US)
27AQI (US)
32AQI (US)
44AQI (US)
28AQI (US)
28AQI (US)
44AQI (US)
46AQI (US)
12AQI (US)
12AQI (US)
32AQI (US)
34AQI (US)
40AQI (US)
46AQI (US)
56AQI (US)
53AQI (US)
56AQI (US)
52AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
28AQI (US)
48AQI (US)
40AQI (US)
42AQI (US)
47AQI (US)
18AQI (US)
12AQI (US)
24AQI (US)
14AQI (US)
21AQI (US)
55AQI (US)
36AQI (US)
43AQI (US)
48AQI (US)
42AQI (US)
34AQI (US)
35AQI (US)
40AQI (US)
50AQI (US)
50AQI (US)
54AQI (US)
34AQI (US)
38AQI (US)
44AQI (US)
44AQI (US)
40AQI (US)
46AQI (US)
24AQI (US)
52AQI (US)
47AQI (US)
44AQI (US)
46AQI (US)
44AQI (US)
51AQI (US)
10AQI (US)
20AQI (US)
53AQI (US)
59AQI (US)
49AQI (US)
13AQI (US)
17AQI (US)
28AQI (US)
43AQI (US)
36AQI (US)
18AQI (US)
33AQI (US)
30AQI (US)
24AQI (US)
24AQI (US)
34AQI (US)
27AQI (US)
28AQI (US)
30AQI (US)
40AQI (US)
28AQI (US)
26AQI (US)
32AQI (US)
32AQI (US)
31AQI (US)
30AQI (US)
30AQI (US)
35AQI (US)
27AQI (US)
21AQI (US)
31AQI (US)
41AQI (US)
39AQI (US)
34AQI (US)
31AQI (US)
26AQI (US)
28AQI (US)
40AQI (US)
48AQI (US)
20AQI (US)
21AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
37AQI (US)
30AQI (US)
32AQI (US)
84AQI (US)
68AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
60AQI (US)
62AQI (US)
54AQI (US)
59AQI (US)
49AQI (US)
40AQI (US)
24AQI (US)
25AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
20AQI (US)
21AQI (US)
29AQI (US)
34AQI (US)
41AQI (US)
30AQI (US)
39AQI (US)
24AQI (US)
No. of days
202634AQI (US)
Highest AQI (US) recorded in
March41AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202539AQI (US)
Highest AQI (US) recorded in
August46AQI (US)
Lowest AQI (US) recorded in
January32AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
April44AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202335AQI (US)
Highest AQI (US) recorded in
April45AQI (US)
Lowest AQI (US) recorded in
October28AQI (US)
202235AQI (US)
Highest AQI (US) recorded in
May43AQI (US)
Lowest AQI (US) recorded in
August22AQI (US)
202131AQI (US)
Highest AQI (US) recorded in
June41AQI (US)
Lowest AQI (US) recorded in
January24AQI (US)
202029AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
July20AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Ina's annual 2026 AQI (US) (34) shows an average percentage change of 1.9% (worsened AQI (US)) compared to previous years: 2020 (29), 2021 (31), 2022 (35), 2023 (35), 2024 (33), 2025 (39).