Yaita, Tochigi, 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
Yaita, Tochigi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (19th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 58 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Oct - 20th Oct 2025
Yaita, Tochigi, Japan
5 AM19th Oct 2025
5 PM
4 AM20th Oct 2025
59AQI
38AQI
56AQI
23AQI
In the last 24 hours,
Yaita's AQI reached its highest point of 59 at 5 AM during the Day, while the lowest point, 23, was recorded at 4 AM during the Night between 19th Oct and 20th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Yaita, Tochigi, Japan
17°C15/20°C
20°C15/25°C
17°C12/24°C
16°C12/22°C
16°C12/22°C
19°C13/25°C
21°C17/29°C
20°C14/26°C
18°C14/24°C
21°C15/29°C
18°C14/24°C
16°C13/17°C
17°C11/25°C
17°C13/23°C
17°C14/22°C
19°C16/25°C
21°C17/27°C
16°C15/17°C
19°C15/26°C
15°C10/19°C
14°C9/21°C
13°C12/14°C
17°C11/24°C
17°C13/21°C
12°C11/15°C
15°C10/21°C
14°C12/16°C
16°C12/23°C
16°C11/22°C
15°C11/21°C
--°C/°C
44AQI
42AQI
46AQI
45AQI
2025 Days Vs Air Quality
Yaita, Tochigi, Japan
80%
234
20%
58
Total number of days with different AQI categories in last 293 days in 2025 (72 days remaining)
Under WHO’s Safe Air Quality Limits: 80%
Health Risk Level:
Low
In 2025, 80% of 293 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
Yaita, Tochigi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
26AQI
26AQI
26AQI
26AQI
42AQI
26AQI
30AQI
29AQI
26AQI
24AQI
28AQI
35AQI
34AQI
31AQI
28AQI
27AQI
28AQI
35AQI
31AQI
36AQI
33AQI
37AQI
38AQI
32AQI
32AQI
29AQI
33AQI
30AQI
29AQI
28AQI
29AQI
40AQI
31AQI
33AQI
31AQI
28AQI
32AQI
31AQI
28AQI
28AQI
29AQI
31AQI
32AQI
31AQI
30AQI
51AQI
35AQI
39AQI
31AQI
31AQI
32AQI
32AQI
32AQI
34AQI
34AQI
38AQI
36AQI
46AQI
53AQI
52AQI
39AQI
37AQI
30AQI
34AQI
35AQI
36AQI
36AQI
38AQI
42AQI
40AQI
44AQI
30AQI
37AQI
21AQI
21AQI
23AQI
18AQI
24AQI
37AQI
46AQI
51AQI
53AQI
68AQI
60AQI
67AQI
52AQI
35AQI
33AQI
29AQI
25AQI
22AQI
18AQI
20AQI
27AQI
26AQI
28AQI
39AQI
26AQI
45AQI
37AQI
41AQI
25AQI
24AQI
26AQI
24AQI
43AQI
53AQI
67AQI
65AQI
46AQI
54AQI
30AQI
36AQI
33AQI
47AQI
46AQI
54AQI
33AQI
40AQI
42AQI
28AQI
33AQI
31AQI
35AQI
30AQI
24AQI
30AQI
35AQI
20AQI
22AQI
21AQI
35AQI
42AQI
45AQI
52AQI
34AQI
41AQI
44AQI
56AQI
67AQI
54AQI
50AQI
44AQI
29AQI
30AQI
28AQI
28AQI
35AQI
29AQI
21AQI
22AQI
36AQI
37AQI
35AQI
38AQI
48AQI
55AQI
66AQI
60AQI
46AQI
35AQI
41AQI
43AQI
41AQI
31AQI
38AQI
41AQI
42AQI
44AQI
43AQI
44AQI
48AQI
45AQI
44AQI
36AQI
34AQI
38AQI
39AQI
45AQI
50AQI
53AQI
52AQI
55AQI
53AQI
55AQI
57AQI
66AQI
73AQI
77AQI
61AQI
48AQI
47AQI
50AQI
38AQI
37AQI
41AQI
37AQI
38AQI
36AQI
43AQI
48AQI
49AQI
53AQI
57AQI
55AQI
56AQI
54AQI
52AQI
48AQI
42AQI
44AQI
39AQI
40AQI
46AQI
55AQI
51AQI
46AQI
38AQI
35AQI
37AQI
41AQI
34AQI
32AQI
33AQI
35AQI
43AQI
45AQI
40AQI
43AQI
44AQI
48AQI
46AQI
48AQI
49AQI
54AQI
54AQI
55AQI
48AQI
47AQI
48AQI
52AQI
51AQI
44AQI
39AQI
35AQI
37AQI
30AQI
30AQI
31AQI
35AQI
39AQI
37AQI
34AQI
34AQI
35AQI
41AQI
38AQI
45AQI
45AQI
36AQI
31AQI
27AQI
23AQI
25AQI
24AQI
27AQI
40AQI
46AQI
35AQI
42AQI
29AQI
27AQI
34AQI
48AQI
54AQI
61AQI
52AQI
59AQI
53AQI
61AQI
56AQI
54AQI
52AQI
44AQI
53AQI
51AQI
50AQI
53AQI
49AQI
59AQI
58AQI
30AQI
33AQI
39AQI
37AQI
36AQI
42AQI
51AQI
44AQI
35AQI
53AQI
No. of days
202540AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
January30AQI
202436AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
December27AQI
202337AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
October30AQI
202236AQI
Highest AQI recorded in
April43AQI
Lowest AQI recorded in
October29AQI
202131AQI
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
January25AQI
202031AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
December20AQI
Most & Least Polluted Years Over the Last 6 Years
Yaita's annual 2025 AQI (40) shows an average percentage change of 16.9% (worsened AQI) compared to previous years: 2020 (31), 2021 (31), 2022 (36), 2023 (37), 2024 (36).