Numatacho Oaza Tomo, Hiroshima, Hiroshima, 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
Numatacho Oaza Tomo, Hiroshima, Hiroshima, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (18th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 30 of Good air quality, showing improvement over 2025 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Feb - 18th Feb 2026
Numatacho Oaza Tomo, Hiroshima, Hiroshima, Japan
7 AM17th Feb 2026
5 PM
6 AM18th Feb 2026
55AQI
8AQI
36AQI
10AQI
In the last 24 hours,
Numatacho Oaza Tomo's AQI reached its highest point of 55 at 10 AM during the Day, while the lowest point, 8, was recorded at 2 PM during the Day between 17th Feb and 18th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Numatacho Oaza Tomo, Hiroshima, Hiroshima, Japan
5°C0/10°C
1°C0/5°C
0°C-2/2°C
1°C-1/6°C
2°C-2/6°C
1°C-2/5°C
2°C-3/6°C
3°C0/7°C
3°C-1/8°C
3°C0/6°C
2°C-1/6°C
2°C-1/7°C
2°C-1/7°C
2°C-1/8°C
2°C-2/8°C
5°C1/11°C
8°C4/12°C
8°C5/13°C
5°C1/8°C
-1°C-3/1°C
0°C-5/6°C
4°C-2/8°C
7°C5/10°C
5°C2/11°C
6°C1/12°C
7°C2/12°C
11°C8/15°C
8°C5/13°C
5°C2/10°C
5°C2/10°C
55AQI
28AQI
52AQI
26AQI
2026 Days Vs Air Quality
Numatacho Oaza Tomo, Hiroshima, Hiroshima, Japan
94%
46
6%
3
Total number of days with different AQI categories in last 50 days in 2026 (315 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 50 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Numatacho Oaza Tomo, Hiroshima, Hiroshima, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI (US)
18AQI (US)
22AQI (US)
29AQI (US)
42AQI (US)
26AQI (US)
31AQI (US)
23AQI (US)
21AQI (US)
39AQI (US)
19AQI (US)
20AQI (US)
33AQI (US)
23AQI (US)
32AQI (US)
43AQI (US)
48AQI (US)
51AQI (US)
45AQI (US)
13AQI (US)
11AQI (US)
23AQI (US)
39AQI (US)
40AQI (US)
41AQI (US)
27AQI (US)
34AQI (US)
28AQI (US)
20AQI (US)
39AQI (US)
29AQI (US)
42AQI (US)
40AQI (US)
30AQI (US)
32AQI (US)
39AQI (US)
40AQI (US)
22AQI (US)
25AQI (US)
32AQI (US)
36AQI (US)
48AQI (US)
42AQI (US)
50AQI (US)
61AQI (US)
52AQI (US)
48AQI (US)
28AQI (US)
30AQI (US)
30AQI (US)
39AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February39AQI (US)
Lowest AQI (US) recorded in
January30AQI (US)
202539AQI (US)
Highest AQI (US) recorded in
July48AQI (US)
Lowest AQI (US) recorded in
April26AQI (US)
202436AQI (US)
Highest AQI (US) recorded in
May44AQI (US)
Lowest AQI (US) recorded in
December27AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
April47AQI (US)
Lowest AQI (US) recorded in
December31AQI (US)
202237AQI (US)
Highest AQI (US) recorded in
May48AQI (US)
Lowest AQI (US) recorded in
December28AQI (US)
202136AQI (US)
Highest AQI (US) recorded in
June46AQI (US)
Lowest AQI (US) recorded in
December31AQI (US)
202035AQI (US)
Highest AQI (US) recorded in
August53AQI (US)
Lowest AQI (US) recorded in
December27AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Numatacho Oaza Tomo's annual 2026 AQI (US) (33) shows an average percentage change of -9.7% (improved AQI (US)) compared to previous years: 2020 (35), 2021 (36), 2022 (37), 2023 (38), 2024 (36), 2025 (39).