What is the air quality in Aso today?

The current Air Quality Index (AQI) in Aso is 20 (Good). PM2.5 concentration is 4.89 µg/m³.

What is the temperature in Aso right now?

The current temperature in Aso is 21.0°C (feels like 21.0°C). Humidity is 68.8% and wind speed is 20.8 km/h.

Is it safe to go outside in Aso?

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

Air Quality in Aso, Japan

Drizzle

21.0°C · 68.8% humidity

21.0°

Feels 21.0°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

46h · 16 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.

68.8%

Humidity

20.8 km/h

Wind WSW

1016.0 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.89 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Aso?

Temperature & Precipitation

PM2.5 Trend

46h · 16 stations

PM2.54.89 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (2 stations within 25 km)

4.89

Median

4.05

Average

3.1

Low

5.0

High

PM2.5 µg/m³ · Model: 6.0 · Bias: +1.1

What is the 7-day forecast for Aso?

10-21

21.0° 11.6°

5.0 mm

10-22

23.7° 13.8°

0.19 mm

10-23

20.4° 12.4°

3.31 mm

10-24

19.7° 14.1°

10-25

16.5° 6.8°

9.44 mm

10-26

15.6° 6.5°

10-27

16.8° 9.8°

0.06 mm

Both models agree Avg diff: 5.5°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

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

19.5 km PM2.5: 3.1 µg/m³

What cities are near Aso?

13 Ōzu 13 Kikuchi 15 Okino 15 Kōshi 23 Takedamachi 18 Shimada 18 Mifune 24 Kotō 17 Uekimachi-mōno 17 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 2026-10-21T07:41 UTC.