Kiyoharadai, Utsunomiya, Tochigi, 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
Kiyoharadai, Utsunomiya, Tochigi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (9th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 37 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Kiyoharadai, Utsunomiya, Tochigi, Japan
4 AM10th Aug 2025
6 PM
3 AM11th Aug 2025
AQI
AQI
43AQI
27AQI
In the last 24 hours,
Kiyoharadai's AQI reached its highest point of 43 at 2 PM during the Night, while the lowest point, 27, was recorded at 6 PM during the Night between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Kiyoharadai, Utsunomiya, Tochigi, Japan
22°C20/25°C
25°C20/30°C
24°C22/28°C
25°C24/28°C
26°C23/29°C
27°C25/31°C
27°C23/32°C
28°C23/33°C
29°C24/35°C
30°C25/36°C
30°C25/36°C
30°C25/36°C
30°C25/36°C
30°C24/37°C
30°C24/37°C
30°C25/36°C
31°C25/37°C
30°C26/37°C
28°C24/35°C
27°C23/34°C
27°C23/31°C
30°C26/37°C
30°C26/36°C
30°C25/37°C
32°C27/39°C
29°C26/36°C
27°C25/31°C
26°C22/34°C
26°C21/32°C
--°C/°C
--°C/°C
45AQI
37AQI
45AQI
41AQI
2025 Days Vs Air Quality
Kiyoharadai, Utsunomiya, Tochigi, Japan
86%
191
14%
30
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 222 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
Kiyoharadai, Utsunomiya, Tochigi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
30AQI
24AQI
25AQI
31AQI
51AQI
31AQI
34AQI
31AQI
27AQI
29AQI
31AQI
34AQI
40AQI
36AQI
35AQI
35AQI
32AQI
56AQI
40AQI
45AQI
39AQI
44AQI
47AQI
36AQI
34AQI
32AQI
37AQI
30AQI
33AQI
29AQI
30AQI
35AQI
33AQI
31AQI
33AQI
29AQI
29AQI
31AQI
27AQI
29AQI
28AQI
36AQI
34AQI
32AQI
28AQI
39AQI
38AQI
31AQI
28AQI
29AQI
31AQI
30AQI
31AQI
31AQI
42AQI
40AQI
43AQI
49AQI
53AQI
58AQI
37AQI
38AQI
26AQI
34AQI
29AQI
40AQI
36AQI
38AQI
47AQI
48AQI
49AQI
46AQI
44AQI
27AQI
25AQI
25AQI
20AQI
28AQI
39AQI
51AQI
54AQI
53AQI
70AQI
65AQI
70AQI
56AQI
37AQI
38AQI
33AQI
27AQI
22AQI
22AQI
23AQI
29AQI
27AQI
29AQI
42AQI
29AQI
46AQI
40AQI
39AQI
26AQI
26AQI
29AQI
26AQI
45AQI
54AQI
66AQI
61AQI
45AQI
52AQI
30AQI
39AQI
33AQI
48AQI
45AQI
54AQI
33AQI
46AQI
43AQI
32AQI
33AQI
33AQI
36AQI
31AQI
26AQI
31AQI
37AQI
20AQI
23AQI
21AQI
37AQI
41AQI
44AQI
49AQI
30AQI
39AQI
41AQI
55AQI
61AQI
52AQI
49AQI
41AQI
31AQI
30AQI
26AQI
26AQI
31AQI
26AQI
18AQI
22AQI
35AQI
37AQI
31AQI
38AQI
49AQI
54AQI
63AQI
57AQI
45AQI
35AQI
38AQI
41AQI
39AQI
28AQI
33AQI
35AQI
34AQI
38AQI
38AQI
35AQI
33AQI
33AQI
33AQI
29AQI
30AQI
33AQI
34AQI
38AQI
42AQI
43AQI
43AQI
48AQI
48AQI
51AQI
54AQI
63AQI
67AQI
71AQI
56AQI
48AQI
49AQI
52AQI
43AQI
43AQI
45AQI
41AQI
40AQI
36AQI
39AQI
43AQI
43AQI
43AQI
48AQI
48AQI
49AQI
46AQI
45AQI
42AQI
36AQI
38AQI
36AQI
41AQI
45AQI
54AQI
50AQI
46AQI
40AQI
37AQI
37AQI
35AQI
33AQI
42AQI
38AQI
35AQI
38AQI
47AQI
43AQI
No. of days
202539AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
February33AQI
202437AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
August29AQI
202339AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
October33AQI
202238AQI
Highest AQI recorded in
April43AQI
Lowest AQI recorded in
September30AQI
202139AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
October36AQI
202038AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
September31AQI
Most & Least Polluted Years Over the Last 6 Years
Kiyoharadai's annual 2025 AQI (39) shows an average percentage change of 1.4% (worsened AQI) compared to previous years: 2020 (38), 2021 (39), 2022 (38), 2023 (39), 2024 (37).