Atobe, Saku, Nagano, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Atobe, Saku, Nagano, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (6th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 32 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Oct - 8th Oct 2025
Atobe, Saku, Nagano, Japan
5 AM7th Oct 2025
5 PM
4 AM8th Oct 2025
AQI
AQI
38AQI
14AQI
In the last 24 hours,
Atobe's AQI reached its highest point of 38 at 8 PM during the Night, while the lowest point, undefined, was recorded at 7 PM during the Night between 7th Oct and 8th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Atobe, Saku, Nagano, Japan
22°C17/29°C
22°C16/30°C
21°C16/28°C
20°C16/25°C
18°C16/22°C
20°C16/25°C
21°C18/26°C
22°C18/26°C
22°C18/29°C
23°C17/31°C
20°C15/28°C
15°C13/17°C
16°C13/18°C
18°C11/24°C
14°C9/20°C
15°C12/20°C
15°C9/21°C
18°C10/27°C
19°C14/27°C
17°C13/24°C
18°C14/23°C
19°C12/26°C
15°C11/21°C
14°C10/17°C
14°C8/22°C
14°C9/22°C
14°C11/18°C
17°C13/24°C
17°C12/21°C
--°C/°C
--°C/°C
35AQI
30AQI
37AQI
34AQI
2025 Days Vs Air Quality
Atobe, Saku, Nagano, Japan
89%
247
11%
32
Total number of days with different AQI categories in last 280 days in 2025 (85 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 280 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
Atobe, Saku, Nagano, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
29AQI
26AQI
25AQI
27AQI
35AQI
27AQI
30AQI
26AQI
24AQI
24AQI
30AQI
27AQI
29AQI
30AQI
28AQI
30AQI
27AQI
32AQI
29AQI
39AQI
37AQI
47AQI
50AQI
39AQI
37AQI
31AQI
38AQI
35AQI
38AQI
32AQI
42AQI
47AQI
44AQI
38AQI
36AQI
32AQI
34AQI
31AQI
30AQI
30AQI
32AQI
32AQI
32AQI
39AQI
31AQI
41AQI
40AQI
35AQI
31AQI
28AQI
29AQI
29AQI
29AQI
30AQI
34AQI
34AQI
41AQI
43AQI
48AQI
48AQI
36AQI
35AQI
29AQI
32AQI
34AQI
39AQI
38AQI
38AQI
45AQI
36AQI
45AQI
40AQI
40AQI
23AQI
22AQI
24AQI
19AQI
26AQI
40AQI
46AQI
58AQI
59AQI
76AQI
82AQI
71AQI
45AQI
37AQI
37AQI
32AQI
27AQI
25AQI
21AQI
24AQI
34AQI
28AQI
33AQI
41AQI
26AQI
48AQI
38AQI
47AQI
23AQI
30AQI
21AQI
25AQI
44AQI
53AQI
68AQI
55AQI
42AQI
52AQI
28AQI
34AQI
36AQI
46AQI
45AQI
47AQI
36AQI
52AQI
47AQI
31AQI
35AQI
33AQI
39AQI
26AQI
28AQI
34AQI
37AQI
25AQI
26AQI
26AQI
37AQI
44AQI
47AQI
50AQI
32AQI
43AQI
38AQI
59AQI
63AQI
58AQI
54AQI
44AQI
28AQI
31AQI
33AQI
29AQI
38AQI
26AQI
21AQI
21AQI
34AQI
24AQI
30AQI
36AQI
45AQI
49AQI
57AQI
56AQI
36AQI
29AQI
36AQI
45AQI
35AQI
29AQI
29AQI
36AQI
41AQI
46AQI
49AQI
52AQI
55AQI
47AQI
45AQI
44AQI
41AQI
45AQI
45AQI
49AQI
53AQI
54AQI
49AQI
50AQI
52AQI
54AQI
56AQI
59AQI
65AQI
66AQI
61AQI
49AQI
49AQI
50AQI
45AQI
41AQI
45AQI
38AQI
40AQI
40AQI
40AQI
40AQI
43AQI
43AQI
45AQI
46AQI
44AQI
44AQI
45AQI
48AQI
46AQI
45AQI
38AQI
42AQI
45AQI
54AQI
53AQI
47AQI
38AQI
37AQI
39AQI
37AQI
34AQI
35AQI
35AQI
41AQI
48AQI
45AQI
44AQI
45AQI
45AQI
49AQI
47AQI
47AQI
48AQI
53AQI
54AQI
56AQI
50AQI
46AQI
48AQI
50AQI
49AQI
44AQI
42AQI
39AQI
28AQI
28AQI
31AQI
32AQI
36AQI
41AQI
45AQI
35AQI
34AQI
40AQI
39AQI
39AQI
41AQI
45AQI
40AQI
32AQI
28AQI
26AQI
27AQI
28AQI
30AQI
36AQI
25AQI
30AQI
38AQI
32AQI
20AQI
32AQI
36AQI
43AQI
44AQI
28AQI
32AQI
32AQI
35AQI
41AQI
38AQI
37AQI
41AQI
48AQI
45AQI
34AQI
36AQI
No. of days
202539AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January32AQI
202432AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
February26AQI
202332AQI
Highest AQI recorded in
July43AQI
Lowest AQI recorded in
September22AQI
202234AQI
Highest AQI recorded in
April43AQI
Lowest AQI recorded in
August16AQI
202130AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
January20AQI
202028AQI
Highest AQI recorded in
August46AQI
Lowest AQI recorded in
July17AQI
Most & Least Polluted Years Over the Last 6 Years
Atobe's annual 2025 AQI (39) shows an average percentage change of 25.9% (worsened AQI) compared to previous years: 2020 (28), 2021 (30), 2022 (34), 2023 (32), 2024 (32).