Kami Citytosa Yamada, Kamitakeshi, 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
Kami Citytosa Yamada, Kamitakeshi, Nagano, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (11th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 41 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Oct - 12th Oct 2025
Kami Citytosa Yamada, Kamitakeshi, Nagano, Japan
5 AM11th Oct 2025
5 PM
4 AM12th Oct 2025
AQI
AQI
49AQI
22AQI
In the last 24 hours,
Kami Citytosa Yamada's AQI reached its highest point of 49 at 12 PM during the Night, while the lowest point, 22, was recorded at 4 PM during the Night between 11th Oct and 12th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Kami Citytosa Yamada, Kamitakeshi, Nagano, Japan
18°C14/24°C
20°C14/28°C
19°C15/25°C
20°C15/28°C
21°C15/31°C
21°C14/31°C
19°C12/26°C
15°C11/20°C
16°C12/19°C
15°C8/21°C
13°C5/21°C
14°C8/23°C
14°C7/24°C
16°C9/25°C
17°C11/27°C
16°C10/24°C
19°C12/27°C
19°C13/27°C
17°C11/24°C
14°C8/20°C
13°C8/22°C
15°C8/23°C
15°C12/20°C
17°C11/26°C
16°C10/20°C
13°C10/18°C
16°C10/25°C
12°C5/18°C
11°C4/22°C
--°C/°C
--°C/°C
36AQI
29AQI
36AQI
32AQI
2025 Days Vs Air Quality
Kami Citytosa Yamada, Kamitakeshi, Nagano, Japan
80%
228
20%
56
Total number of days with different AQI categories in last 284 days in 2025 (81 days remaining)
Under WHO’s Safe Air Quality Limits: 80%
Health Risk Level:
Low
In 2025, 80% of 284 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
Kami Citytosa Yamada, Kamitakeshi, Nagano, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
34AQI
31AQI
30AQI
31AQI
42AQI
31AQI
33AQI
30AQI
27AQI
29AQI
33AQI
37AQI
45AQI
43AQI
37AQI
34AQI
36AQI
44AQI
46AQI
45AQI
55AQI
62AQI
63AQI
42AQI
39AQI
38AQI
36AQI
32AQI
37AQI
59AQI
62AQI
44AQI
49AQI
38AQI
38AQI
32AQI
33AQI
31AQI
30AQI
31AQI
31AQI
42AQI
31AQI
41AQI
31AQI
50AQI
41AQI
39AQI
33AQI
31AQI
31AQI
35AQI
33AQI
34AQI
36AQI
38AQI
57AQI
55AQI
65AQI
75AQI
44AQI
40AQI
34AQI
35AQI
34AQI
39AQI
37AQI
40AQI
35AQI
40AQI
48AQI
44AQI
37AQI
24AQI
38AQI
32AQI
30AQI
43AQI
52AQI
59AQI
64AQI
65AQI
68AQI
81AQI
66AQI
53AQI
45AQI
41AQI
37AQI
33AQI
35AQI
24AQI
32AQI
40AQI
43AQI
45AQI
45AQI
52AQI
54AQI
51AQI
52AQI
33AQI
47AQI
22AQI
41AQI
42AQI
53AQI
56AQI
46AQI
41AQI
44AQI
25AQI
31AQI
51AQI
53AQI
57AQI
47AQI
47AQI
58AQI
52AQI
37AQI
42AQI
35AQI
40AQI
24AQI
30AQI
29AQI
32AQI
29AQI
31AQI
44AQI
49AQI
52AQI
49AQI
50AQI
39AQI
48AQI
50AQI
59AQI
43AQI
40AQI
48AQI
35AQI
26AQI
28AQI
26AQI
27AQI
32AQI
31AQI
33AQI
37AQI
43AQI
25AQI
38AQI
40AQI
47AQI
49AQI
55AQI
41AQI
34AQI
35AQI
45AQI
47AQI
33AQI
32AQI
40AQI
38AQI
45AQI
49AQI
52AQI
52AQI
53AQI
48AQI
42AQI
40AQI
44AQI
49AQI
50AQI
51AQI
54AQI
54AQI
61AQI
66AQI
75AQI
77AQI
67AQI
65AQI
68AQI
74AQI
60AQI
51AQI
49AQI
48AQI
43AQI
50AQI
52AQI
39AQI
40AQI
36AQI
34AQI
33AQI
33AQI
31AQI
30AQI
29AQI
28AQI
27AQI
29AQI
33AQI
33AQI
38AQI
42AQI
44AQI
47AQI
55AQI
52AQI
49AQI
43AQI
43AQI
44AQI
40AQI
36AQI
35AQI
38AQI
43AQI
48AQI
46AQI
44AQI
45AQI
46AQI
50AQI
46AQI
48AQI
48AQI
53AQI
55AQI
55AQI
49AQI
50AQI
51AQI
53AQI
54AQI
45AQI
42AQI
38AQI
28AQI
38AQI
34AQI
34AQI
38AQI
42AQI
42AQI
34AQI
34AQI
40AQI
41AQI
44AQI
46AQI
47AQI
37AQI
32AQI
37AQI
27AQI
28AQI
29AQI
26AQI
27AQI
34AQI
25AQI
26AQI
30AQI
24AQI
30AQI
40AQI
39AQI
44AQI
27AQI
34AQI
30AQI
38AQI
29AQI
38AQI
41AQI
39AQI
38AQI
47AQI
43AQI
38AQI
44AQI
47AQI
47AQI
35AQI
35AQI
No. of days
202542AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
September35AQI
202433AQI
Highest AQI recorded in
April38AQI
Lowest AQI recorded in
October26AQI
202335AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August21AQI
202235AQI
Highest AQI recorded in
May45AQI
Lowest AQI recorded in
August14AQI
202133AQI
Highest AQI recorded in
May39AQI
Lowest AQI recorded in
January27AQI
202035AQI
Highest AQI recorded in
August51AQI
Lowest AQI recorded in
September27AQI
Most & Least Polluted Years Over the Last 6 Years
Kami Citytosa Yamada's annual 2025 AQI (42) shows an average percentage change of 22.3% (worsened AQI) compared to previous years: 2020 (35), 2021 (33), 2022 (35), 2023 (35), 2024 (33).