What is the air quality in Hirai today?

The current Air Quality Index (AQI) in Hirai is 32 (Good). PM2.5 concentration is 7.65 µg/m³.

What is the temperature in Hirai right now?

The current temperature in Hirai is 16.8°C (feels like 16.8°C). Humidity is 74.3% and wind speed is 38.1 km/h.

Is it safe to go outside in Hirai?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Hirai, Japan

Drizzle

16.8°C · 74.3% humidity

16.8°

Feels 16.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

43 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 9h ago

AQI 69

PM2.5 20.6 µg/m³ · 9h ago

Air Quality Index Trend

39h · 1 stn

View full history →

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.

74.3%

Humidity

38.1 km/h

Wind N

1021.4 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.65 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Hirai?

Temperature & Precipitation

PM2.5 Trend

39h · 1 station

PM2.57.65 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (43 stations within 25 km)

7.65

Median

8.05

Average

2.2

Low

30.2

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -1.6

What is the 7-day forecast for Hirai?

10-21

22.2° 16.8°

0.88 mm

10-22

23.4° 18.5°

0.31 mm

10-23

23.0° 15.9°

10-24

22.1° 17.4°

0.25 mm

10-25

20.1° 14.9°

3.75 mm

10-26

20.6° 15.8°

0.19 mm

10-27

19.4° 15.2°

1.06 mm

Both models agree Avg diff: 2.9°C

Where are air quality stations near Hirai?

Ojima, Koto, Tokyo, Japan (江東区大島江東区)

2.6 km PM2.5: 8.2 µg/m³

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スカイツリー３２５ｍ

2.9 km 81.0% RH PM2.5: -5.0 µg/m³ PM10: 3.0 µg/m³

スカイツリー１５０ｍ

2.9 km 65.5% RH PM2.5: 6.0 µg/m³ PM10: 12.0 µg/m³

Minowa, Taito, Tokyo, Japan (明治通り大関横丁台東区)

4.5 km PM2.5: 8.2 µg/m³

Haruecho, Edogawa, Tokyo, Japan (江戸川区春江町江戸川区)

4.8 km PM2.5: 4.3 µg/m³

Kamakura, Katsushika, Tokyo, Japan (葛飾区鎌倉葛飾区)

5.1 km PM2.5: 6.0 µg/m³

Kameari, Katsushika, Tokyo, Japan (環七通り亀有葛飾区)

6.1 km PM2.5: 7.2 µg/m³

Kanda Tsukasamachi, Chiyoda, Tokyo, Japan (千代田区神田司町千代田区)

6.7 km PM2.5: 3.1 µg/m³

Ayase, Adachi, Tokyo, Japan (足立区綾瀬足立区)

6.7 km PM2.5: 5.0 µg/m³

Tatsumi, Koto, Tokyo, Japan (三ツ目通り辰巳江東区)

7.2 km PM2.5: 7.2 µg/m³

What cities are near Hirai?

34 Ōjima 30 Katsushika 34 Edogawe 30 Sumida 34 Funabori 35 Ichinoe 32 Asakusa 28 Horikiri 29 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 2026-10-21T08:29 UTC.