Air Quality in Hirai, Japan

Drizzle
25.1°C · 74.6% humidity
25.1°
Feels 25.1°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
49 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
20 5pm
20
20
25 8pm
24
23
20 11pm
19
19
19 2am
18
18
18 5am
18
18
18 8am
18
27
27 11am
27
27
27 2pm
47
47
Station readings
11
35
CAMS model adj -7
27
27
27
27
27
27
25
25
25
25
25
25
25
25
25
25
25
34
34
34
34
34
54
54
AD 728×90

Air Quality Index Trend

40h · 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.

74.6%
Humidity
54.9 km/h
Wind ENE
1009.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.01 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Hirai?

Temperature & Precipitation

PM2.5 Trend

40h · 1 station
PM2.56.01 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (49 stations within 25 km)
6.01
Median
7.45
Average
1.2
Low
82.0
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +0.1

What is the 7-day forecast for Hirai?

09-05
27.8° 21.4°
10.25 mm
09-06
31.7° 23.5°
1.37 mm
09-07
31.9° 23.8°
1.06 mm
09-08
30.5° 23.2°
1.06 mm
09-09
27.7° 22.4°
14.12 mm
09-10
29.7° 24.5°
4.31 mm
09-11
31.4° 24.2°
0.19 mm
Both models agree Avg diff: 3.6°C

Where are air quality stations near Hirai?

32
Edogawa (江戸川区)
2.3 km PM2.5: 7.7 µg/m³
21
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 5.0 µg/m³
14
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 3.4 µg/m³
29
スカイツリー３２５ｍ
2.9 km 69.3% RH PM2.5: 7.0 µg/m³ PM10: 7.0 µg/m³
21
スカイツリー１５０ｍ
2.9 km 75.1% RH PM2.5: 5.0 µg/m³ PM10: 5.0 µg/m³
12
Katsushika (葛飾)
4.0 km PM2.5: 2.9 µg/m³
32
Koto (江東区)
4.5 km PM2.5: 7.7 µg/m³
21
Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)
4.5 km PM2.5: 5.0 µg/m³
13
Haruecho, Edogawa, Tokyo, Japan (江戸川区春江町江戸川区)
4.8 km PM2.5: 3.1 µg/m³
13
Kamakura, Katsushika, Tokyo, Japan (葛飾区鎌倉葛飾区)
5.1 km PM2.5: 3.1 µg/m³

What cities are near Hirai?

27 Ōjima 25 Katsushika 27 Edogawe 24 Sumida 27 Funabori 27 Ichinoe 21 Asakusa 23 Horikiri 25 Aoto 30 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 2026-09-05T11:13 UTC.