Air Quality in Hirai, Japan

Cloudy
21.1°C · 70.4% humidity
21.1°
Feels 21.1°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
47 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
36 6am
36
36
20 9am
25
8
10 12pm
12
13
14 3pm
14
35
35 6pm
35
48
48 9pm
48
48
48 12am
65
65
48 3am
36
36
Station readings
2
CAMS model adj -18
54
54
54
54
54
34
34
34
34
34
34
54
54
54
66
66
66
66
66
83
83
66
54
54
AD 728×90

Air Quality Index Trend

38h · 1 stn

Hirai'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.

70.4%
Humidity
34.3 km/h
Wind SSE
1015.5 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
20
4.77 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Hirai?

Temperature & Precipitation

PM2.5 Trend

38h · 1 station
PM2.54.77 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (47 stations within 25 km)
4.77
Median
3.75
Average
0.48
Low
8.2
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +5.2

What is the 7-day forecast for Hirai?

06-09
23.3° 21.1°
06-10
28.5° 19.3°
4.44 mm
06-11
25.7° 20.1°
0.94 mm
06-12
24.5° 19.9°
1.37 mm
06-13
30.0° 21.7°
6.0 mm
06-14
28.7° 18.6°
26.88 mm
06-15
27.1° 21.0°
17.44 mm
Both models agree Avg diff: 2.1°C

Where are air quality stations near Hirai?

7
Edogawa (江戸川区)
2.3 km PM2.5: 1.7 µg/m³
29
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 7.0 µg/m³
13
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 3.1 µg/m³
–
スカイツリー３２５ｍ
2.9 km 97.5% RH PM2.5: -4.0 µg/m³ PM10: 0.0 µg/m³
4
スカイツリー１５０ｍ
2.9 km 98.5% RH PM2.5: 1.0 µg/m³ PM10: 1.0 µg/m³
34
Koto (江東区)
4.5 km PM2.5: 8.2 µg/m³
13
Koto (江東区)
4.5 km PM2.5: 3.1 µg/m³
9
Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)
4.5 km PM2.5: 2.2 µg/m³
42
Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)
4.5 km PM2.5: 10.1 µg/m³
7
Haruecho, Edogawa, Tokyo, Japan (江戸川区春江町江戸川区)
4.8 km PM2.5: 1.7 µg/m³

What cities are near Hirai?

20 Ōjima 26 Katsushika 23 Edogawe 16 Sumida 20 Funabori 22 Ichinoe 10 Asakusa 20 Horikiri 28 Aoto 32 Tōyō
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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 2026-06-09T00:51 UTC.