Air Quality in Hirai, Japan
Cloudy
26.1°C · 70.3% humidity
26.1°
Feels 26.1°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
16 stations
Nearby Monitoring Stations
AQI Forecast
Calibrated
15
9am
19
15
21
12pm
25
28
30
3pm
11
32
13
6pm
14
34
34
9pm
35
35
35
12am
35
35
35
3am
35
35
35
6am
35
35
Station readings
19
CAMS model
adj -19
34
34
34
54
54
54
54
34
54
34
34
54
54
54
54
54
54
54
54
54
54
54
54
54
Air Quality Index Trend
19h · 2 stnHirai's air quality is influenced by industrial emissions, vehicle traffic, and regional pollution transport. Winter heating season and spring dust events typically create the most challenging air quality conditions.
70.3%
Humidity
31.9 km/h
Wind E
1009.4 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
4.96 µg/m³
PM10▲
27.4 µg/m³
050100150200300500
What is the weather forecast for Hirai?
Temperature & Precipitation
PM2.5 Trend
19h · 2 stationsPM2.54.96 µg/m³
✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX4.4
Moderate
Station readings (16 stations within 25 km)
4.96
Median
5.26
Average
2.6
Low
8.4
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +3.2
What is the 7-day forecast for Hirai?
08-03
29.2° 22.1°
11.81 mm
08-04
33.3° 25.9°
6.81 mm
08-05
31.8° 25.8°
2.75 mm
08-06
29.9° 27.2°
12.25 mm
08-07
34.4° 25.5°
9.13 mm
08-08
33.7° 26.6°
45.5 mm
08-09
35.1° 23.7°
0.13 mm
Both models agree
Avg diff: 2.6°C
Where are air quality stations near Hirai?
34
Edogawa (江戸川区)
50
スカイツリー150m
8
スカイツリー325m
25
Katsushika (葛飾)
21
Katsushika (葛飾)
25
Koto (江東区)
37
Haruecho, Edogawa, Tokyo, Japan (江戸川区春江町江戸川区)
48
Kamakura, Katsushika, Tokyo, Japan (葛飾区鎌倉葛飾区)
21
Minamisenju, Arakawa, Tokyo, Japan (荒川区南千住荒川区)
32
Minamikasai, Edogawa, Tokyo, Japan (江戸川区南葛西江戸川区)
What cities are near Hirai?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T03:01 UTC.