Nishitoriishi, Izuo, Osaka, 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
Nishitoriishi, Izuo, Osaka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (13th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 60 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Feb - 13th Feb 2026
Nishitoriishi, Izuo, Osaka, Japan
6 AM12th Feb 2026
5 PM
5 AM13th Feb 2026
62AQI
40AQI
80AQI
54AQI
In the last 24 hours,
Nishitoriishi's AQI reached its highest point of 80 at 10 PM during the Night, while the lowest point, 40, was recorded at 11 AM during the Day between 12th Feb and 13th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Nishitoriishi, Izuo, Osaka, Japan
9°C4/13°C
11°C9/14°C
10°C7/13°C
8°C6/11°C
9°C4/13°C
7°C1/11°C
3°C1/6°C
3°C1/5°C
4°C2/7°C
5°C4/7°C
4°C2/5°C
3°C1/5°C
6°C3/10°C
5°C3/7°C
5°C3/8°C
4°C2/6°C
4°C2/6°C
6°C3/9°C
6°C5/8°C
5°C3/8°C
6°C3/10°C
9°C6/12°C
9°C6/13°C
5°C3/7°C
1°C-1/2°C
2°C-1/6°C
6°C1/11°C
8°C6/9°C
7°C5/10°C
7°C4/10°C
43AQI
33AQI
40AQI
34AQI
2026 Days Vs Air Quality
Nishitoriishi, Izuo, Osaka, Japan
84%
37
16%
7
Total number of days with different AQI categories in last 45 days in 2026 (320 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2026, 84% of 45 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
Nishitoriishi, Izuo, Osaka, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI (US)
21AQI (US)
20AQI (US)
30AQI (US)
54AQI (US)
25AQI (US)
31AQI (US)
34AQI (US)
20AQI (US)
43AQI (US)
33AQI (US)
35AQI (US)
39AQI (US)
27AQI (US)
47AQI (US)
62AQI (US)
59AQI (US)
45AQI (US)
53AQI (US)
26AQI (US)
14AQI (US)
23AQI (US)
39AQI (US)
44AQI (US)
13AQI (US)
17AQI (US)
42AQI (US)
24AQI (US)
17AQI (US)
37AQI (US)
34AQI (US)
40AQI (US)
50AQI (US)
24AQI (US)
37AQI (US)
49AQI (US)
44AQI (US)
16AQI (US)
15AQI (US)
39AQI (US)
46AQI (US)
52AQI (US)
52AQI (US)
60AQI (US)
33AQI (US)
40AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February40AQI (US)
Lowest AQI (US) recorded in
January33AQI (US)
202545AQI (US)
Highest AQI (US) recorded in
July52AQI (US)
Lowest AQI (US) recorded in
September34AQI (US)
202439AQI (US)
Highest AQI (US) recorded in
April50AQI (US)
Lowest AQI (US) recorded in
December32AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
April51AQI (US)
Lowest AQI (US) recorded in
August27AQI (US)
202239AQI (US)
Highest AQI (US) recorded in
March49AQI (US)
Lowest AQI (US) recorded in
August29AQI (US)
202140AQI (US)
Highest AQI (US) recorded in
July50AQI (US)
Lowest AQI (US) recorded in
August31AQI (US)
202042AQI (US)
Highest AQI (US) recorded in
August58AQI (US)
Lowest AQI (US) recorded in
October33AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Nishitoriishi's annual 2026 AQI (US) (35) shows an average percentage change of -13.1% (improved AQI (US)) compared to previous years: 2020 (42), 2021 (40), 2022 (39), 2023 (41), 2024 (39), 2025 (45).