Air Quality in Hirai, Japan

Windy
23.5°C · 63.0% humidity
23.5°
Feels 23.5°
32
Good
Air quality is satisfactory. Enjoy outdoor activities.
57 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
24 4am
24
31
32 7am
31
31
24 10am
31
31
51 1pm
51
51
51 4pm
63
63
63 7pm
80
63
24 10pm
31
31
31 1am
31
31
Station readings
41
48
25
11
CAMS model adj -3
27
27
34
34
34
34
27
34
34
54
54
54
54
66
66
66
83
66
27
34
34
34
34
34
AD 728×90

Air Quality Index Trend

31h · 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. Current PM2.5 concentration in Hirai is 1.5× the WHO annual guideline of 5 µg/m³.

63.0%
Humidity
172.2 km/h
Wind S
999.5 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
32
7.63 µg/m³
PM10
25
27.45 µg/m³
050100150200300500

What is the weather forecast for Hirai?

Temperature & Precipitation

PM2.5 Trend

31h · 1 station
PM2.57.63 µg/m³ ✓ WHO
Good
PM1027.45 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (57 stations within 25 km)
7.63
Median
8.48
Average
4.1
Low
15.0
High
PM2.5 µg/m³ · Model: 13.7 · Bias: +6.1

What is the 7-day forecast for Hirai?

05-28
28.6° 15.9°
05-29
24.8° 20.0°
05-30
24.6° 19.9°
0.94 mm
05-31
26.4° 20.6°
0.19 mm
06-01
27.3° 21.3°
06-02
26.6° 21.3°
06-03
27.7° 22.7°
0.06 mm
Both models agree Avg diff: 2.4°C

Where are air quality stations near Hirai?

55
Edogawa (江戸川区)
2.3 km PM2.5: 14.0 µg/m³
21
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 5.0 µg/m³
43
Ojima, Koto, Tokyo, Japan (江東区大島江東区)
2.6 km PM2.5: 10.3 µg/m³
17
スカイツリー３２５ｍ
2.9 km 88.2% RH PM2.5: 4.0 µg/m³ PM10: 8.0 µg/m³
25
スカイツリー１５０ｍ
2.9 km 96.4% RH PM2.5: 6.0 µg/m³ PM10: 9.0 µg/m³
34
Koto (江東区)
4.5 km PM2.5: 8.2 µg/m³
34
Koto (江東区)
4.5 km PM2.5: 8.2 µg/m³
17
Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)
4.5 km PM2.5: 4.1 µg/m³
39
Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)
4.5 km PM2.5: 9.4 µg/m³
39
Haruecho, Edogawa, Tokyo, Japan (江戸川区春江町江戸川区)
4.8 km PM2.5: 9.4 µg/m³

What cities are near Hirai?

31 Ōjima 34 Katsushika 36 Edogawe 31 Sumida 35 Funabori 36 Ichinoe 29 Asakusa 32 Horikiri 35 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 2026-05-28T22:52 UTC.