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
7am
15
15
21
10am
19
38
37
1pm
37
36
16
4pm
36
15
15
7pm
35
35
35
10pm
35
35
35
1am
35
35
35
4am
35
35
Station readings
19
CAMS model
adj -19
34
34
34
34
34
54
54
54
54
34
54
34
34
54
54
54
54
54
54
54
54
54
54
54
Air Quality Index Trend
21h · 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
21h · 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)
17
スカイツリー325m
50
スカイツリー150m
25
Katsushika (葛飾)
21
Katsushika (葛飾)
23
Koto (江東区)
25
Koto (江東区)
34
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)
42
Minamisenju, Arakawa, Tokyo, Japan (荒川区南千住荒川区)
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 2026-08-08T01:58 UTC.