What is the air quality in Aso today?

The current Air Quality Index (AQI) in Aso is 25 (Good). PM2.5 concentration is 6.0 µg/m³.

What is the temperature in Aso right now?

The current temperature in Aso is 20.8°C (feels like 20.8°C). Humidity is 82.4% and wind speed is 41.5 km/h.

Is it safe to go outside in Aso?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Aso, Japan

Windy

20.8°C · 82.4% humidity

20.8°

Feels 20.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

24 6pm

25 9pm

24 12am

24 3am

24 6am

24 9am

24 12pm

24 3pm

Air Quality Index Trend

45h · 9 stn

View full history →

Aso'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.

82.4%

Humidity

41.5 km/h

Wind ENE

1002.2 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.0 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Aso?

Temperature & Precipitation

PM2.5 Trend

45h · 9 stations

PM2.56.0 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (2 stations within 25 km)

6.0

Median

6.0

Average

6.0

Low

6.0

High

PM2.5 µg/m³ · Model: 6.25 · Bias: +0.2

What is the 7-day forecast for Aso?

09-05

26.3° 20.8°

1.5 mm

09-06

26.5° 19.1°

0.19 mm

09-07

25.1° 20.0°

1.25 mm

09-08

25.0° 19.7°

1.25 mm

09-09

26.2° 19.9°

1.56 mm

09-10

24.6° 17.5°

2.44 mm

09-11

26.4° 18.6°

8.94 mm

Both models agree Avg diff: 2.0°C

Where are air quality stations near Aso?

Uchinomaki, Aso, Kumamoto, Japan (阿蘇保健所阿蘇市)

4.7 km PM2.5: 5.0 µg/m³

Uchinomaki, Aso, Kumamoto, Japan (阿蘇保健所阿蘇市)

4.7 km PM2.5: 6.0 µg/m³

Hikimizu, Kumamoto, Japan (大津町引水菊池郡大津町)

19.5 km PM2.5: 6.0 µg/m³

Hikimizu, Kumamoto, Japan (大津町引水菊池郡大津町)

19.5 km PM2.5: 8.2 µg/m³

What cities are near Aso?

25 Ōzu 24 Kikuchi 23 Okino 23 Kōshi 23 Takedamachi 20 Shimada 20 Mifune 20 Kotō 21 Uekimachi-mōno 24 Yamaga

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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 2026-09-05T12:45 UTC.