Hiraidemachi, Utsunomiya, Tochigi, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
February Air Quality Analysis
Hiraidemachi, Utsunomiya, Tochigi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (15th February):
On this day, AQI across the 4 years varied significantly: 2026 ranks 2nd highest AQI at 61 of Moderate air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 14th Feb - 15th Feb 2026
Hiraidemachi, Utsunomiya, Tochigi, Japan
6 AM14th Feb 2026
5 PM
5 AM15th Feb 2026
94AQI
38AQI
66AQI
40AQI
In the last 24 hours,
Hiraidemachi's AQI reached its highest point of 94 at 10 AM during the Day, while the lowest point, 38, was recorded at 4 PM during the Day between 14th Feb and 15th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Hiraidemachi, Utsunomiya, Tochigi, Japan
7°C3/12°C
5°C2/9°C
5°C1/8°C
4°C0/10°C
2°C0/5°C
1°C-1/3°C
1°C-2/6°C
2°C-1/7°C
1°C-1/4°C
1°C-1/5°C
4°C1/8°C
3°C0/7°C
2°C0/7°C
2°C-1/5°C
2°C-1/6°C
3°C-1/8°C
3°C0/8°C
3°C0/8°C
4°C0/10°C
7°C2/11°C
7°C3/13°C
1°C-1/2°C
-3°C-8/0°C
0°C-5/5°C
3°C-1/8°C
4°C1/8°C
5°C1/9°C
5°C1/10°C
7°C2/13°C
10°C5/16°C
53AQI
35AQI
45AQI
30AQI
2026 Days Vs Air Quality
Hiraidemachi, Utsunomiya, Tochigi, Japan
89%
41
11%
5
Total number of days with different AQI categories in last 47 days in 2026 (318 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2026, 89% of 47 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
Hiraidemachi, Utsunomiya, Tochigi, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
16AQI (US)
14AQI (US)
21AQI (US)
20AQI (US)
26AQI (US)
24AQI (US)
37AQI (US)
37AQI (US)
30AQI (US)
37AQI (US)
40AQI (US)
12AQI (US)
30AQI (US)
18AQI (US)
32AQI (US)
51AQI (US)
49AQI (US)
28AQI (US)
46AQI (US)
31AQI (US)
20AQI (US)
27AQI (US)
52AQI (US)
49AQI (US)
40AQI (US)
19AQI (US)
27AQI (US)
30AQI (US)
30AQI (US)
38AQI (US)
44AQI (US)
43AQI (US)
20AQI (US)
23AQI (US)
50AQI (US)
46AQI (US)
43AQI (US)
15AQI (US)
15AQI (US)
39AQI (US)
48AQI (US)
51AQI (US)
34AQI (US)
48AQI (US)
66AQI (US)
61AQI (US)
31AQI (US)
40AQI (US)
No. of days
202634AQI (US)
Highest AQI (US) recorded in
February40AQI (US)
Lowest AQI (US) recorded in
January31AQI (US)
202539AQI (US)
Highest AQI (US) recorded in
July47AQI (US)
Lowest AQI (US) recorded in
February31AQI (US)
202437AQI (US)
Highest AQI (US) recorded in
April48AQI (US)
Lowest AQI (US) recorded in
January30AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
April46AQI (US)
Lowest AQI (US) recorded in
August31AQI (US)
202237AQI (US)
Highest AQI (US) recorded in
April42AQI (US)
Lowest AQI (US) recorded in
January26AQI (US)
202139AQI (US)
Highest AQI (US) recorded in
June44AQI (US)
Lowest AQI (US) recorded in
November36AQI (US)
202040AQI (US)
Highest AQI (US) recorded in
August50AQI (US)
Lowest AQI (US) recorded in
September31AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Hiraidemachi's annual 2026 AQI (US) (34) shows an average percentage change of -10.8% (improved AQI (US)) compared to previous years: 2020 (40), 2021 (39), 2022 (37), 2023 (38), 2024 (37), 2025 (39).