Yahara, Kasukabe, Saitama, 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
Yahara, Kasukabe, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (8th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 15 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Feb - 8th Feb 2026
Yahara, Kasukabe, Saitama, Japan
6 AM7th Feb 2026
5 PM
5 AM8th Feb 2026
21AQI
8AQI
21AQI
8AQI
In the last 24 hours,
Yahara's AQI reached its highest point of 21 at 2 PM during the Day, while the lowest point, 8, was recorded at 3 AM during the Night between 7th Feb and 8th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Yahara, Kasukabe, Saitama, Japan
9°C5/13°C
9°C4/11°C
5°C2/7°C
9°C4/15°C
8°C6/10°C
7°C4/11°C
10°C6/15°C
10°C6/13°C
8°C5/10°C
7°C5/9°C
7°C2/12°C
4°C2/6°C
3°C1/5°C
4°C0/7°C
5°C2/10°C
4°C2/6°C
4°C1/7°C
6°C2/9°C
6°C3/9°C
5°C3/8°C
4°C2/7°C
5°C2/8°C
6°C2/9°C
6°C4/9°C
6°C3/10°C
7°C3/10°C
9°C5/12°C
10°C6/15°C
3°C1/4°C
-1°C-2/0°C
44AQI
28AQI
43AQI
29AQI
2026 Days Vs Air Quality
Yahara, Kasukabe, Saitama, Japan
92%
36
8%
3
Total number of days with different AQI categories in last 40 days in 2026 (325 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2026, 92% of 40 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
Yahara, Kasukabe, Saitama, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI (US)
23AQI (US)
20AQI (US)
26AQI (US)
47AQI (US)
22AQI (US)
40AQI (US)
35AQI (US)
17AQI (US)
38AQI (US)
34AQI (US)
21AQI (US)
45AQI (US)
13AQI (US)
33AQI (US)
53AQI (US)
50AQI (US)
23AQI (US)
48AQI (US)
39AQI (US)
12AQI (US)
18AQI (US)
37AQI (US)
41AQI (US)
44AQI (US)
25AQI (US)
38AQI (US)
22AQI (US)
19AQI (US)
37AQI (US)
39AQI (US)
40AQI (US)
46AQI (US)
28AQI (US)
40AQI (US)
60AQI (US)
52AQI (US)
13AQI (US)
15AQI (US)
32AQI (US)
37AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February37AQI (US)
Lowest AQI (US) recorded in
January32AQI (US)
202543AQI (US)
Highest AQI (US) recorded in
October53AQI (US)
Lowest AQI (US) recorded in
February35AQI (US)
202439AQI (US)
Highest AQI (US) recorded in
April50AQI (US)
Lowest AQI (US) recorded in
August29AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
April49AQI (US)
Lowest AQI (US) recorded in
August26AQI (US)
202245AQI (US)
Highest AQI (US) recorded in
March51AQI (US)
Lowest AQI (US) recorded in
August28AQI (US)
202143AQI (US)
Highest AQI (US) recorded in
March48AQI (US)
Lowest AQI (US) recorded in
August34AQI (US)
202043AQI (US)
Highest AQI (US) recorded in
November52AQI (US)
Lowest AQI (US) recorded in
September31AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Yahara's annual 2026 AQI (US) (33) shows an average percentage change of -22.5% (improved AQI (US)) compared to previous years: 2020 (43), 2021 (43), 2022 (45), 2023 (42), 2024 (39), 2025 (43).