What is the air quality in Arai today?

The current Air Quality Index (AQI) in Arai is 27 (Good). PM2.5 concentration is 6.49 µg/m³.

What is the temperature in Arai right now?

The current temperature in Arai is 17.6°C (feels like 17.6°C). Humidity is 58.0% and wind speed is 12.3 km/h.

Is it safe to go outside in Arai?

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

Air Quality in Arai, Japan

Partly Cloudy

17.6°C · 58.0% humidity

17.6°

Feels 17.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

16h · 1 stn

View full history →

Arai'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.

58.0%

Humidity

12.3 km/h

Wind NW

1018.2 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.49 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Arai?

Temperature & Precipitation

PM2.5 Trend

16h · 1 station

PM2.56.49 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Arai?

10-21

17.6° 11.0°

10-22

18.8° 11.6°

2.81 mm

10-23

17.3° 8.8°

1.5 mm

10-24

13.4° 10.3°

5.31 mm

10-25

16.0° 6.6°

0.19 mm

10-26

15.0° 7.4°

10-27

13.2° 9.2°

2.62 mm

Both models agree Avg diff: 3.9°C

What cities are near Arai?

26 Myoko 29 Jōetsu 28 Iiyama 42 Nakano 28 Itoigawa 42 Nagano 38 Suzaka 31 Kashiwazaki 11 Tōkamachi 42 Chikuma

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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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 2026-10-21T06:02 UTC.