What is the air quality in Hachiōji today?

The current Air Quality Index (AQI) in Hachiōji is 15 (Good). PM2.5 concentration is 3.45 µg/m³.

What is the temperature in Hachiōji right now?

The current temperature in Hachiōji is 12.7°C (feels like 12.7°C). Humidity is 93.2% and wind speed is 15.6 km/h.

Is it safe to go outside in Hachiōji?

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

Air Quality in Hachiōji, Japan

Rain

12.7°C · 93.2% humidity

12.7°

Feels 12.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

21 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 102 stn

View full history →

Hachiōji'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.

93.2%

Humidity

15.6 km/h

Wind N

1021.8 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

3.45 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Hachiōji?

Temperature & Precipitation

PM2.5 Trend

45h · 102 stations

PM2.53.45 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (21 stations within 25 km)

3.45

Median

5.19

Average

0.5

Low

15.9

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +2.3

What is the 7-day forecast for Hachiōji?

10-21

18.0° 12.7°

2.44 mm

10-22

19.8° 15.3°

0.19 mm

10-23

20.7° 10.9°

10-24

17.4° 15.0°

1.25 mm

10-25

17.4° 10.2°

4.94 mm

10-26

18.5° 11.2°

0.06 mm

10-27

15.6° 12.9°

0.31 mm

Both models agree Avg diff: 3.7°C

Where are air quality stations near Hachiōji?

Hachioji (八王子)

1.4 km PM2.5: 2.9 µg/m³

Katakuramachi, Hachioji, Tokyo, Japan (八王子市片倉町八王子市)

2.2 km PM2.5: 5.0 µg/m³

八王子市大楽寺町

3.3 km 40.9% RH PM2.5: 6.0 µg/m³ PM10: 3.0 µg/m³

Tatemachi, Hachioji, Tokyo, Japan (八王子市館町八王子市)

4.5 km PM2.5: 0.5 µg/m³

Izumicho, Tachikawa, Tokyo, Japan (立川市泉町立川市)

9.7 km PM2.5: 12.0 µg/m³

Sagamihara (相模原)

10.4 km PM2.5: 1.2 µg/m³

Yaho, Kunitachi, Tokyo, Japan (甲州街道国立国立市)

10.4 km PM2.5: 4.1 µg/m³

Atago, Tama, Tokyo, Japan (多摩市愛宕多摩市)

10.5 km PM2.5: 4.1 µg/m³

府中市四谷

10.7 km 66.3% RH PM2.5: 4.0 µg/m³ PM10: 10.0 µg/m³

Nagaoka, Tokyo, Japan (東京環状長岡西多摩郡瑞穂町)

13.0 km PM2.5: 23.0 µg/m³

What cities are near Hachiōji?

12 Aihara 19 Hino 26 Akishima 38 Fussa 22 Tachikawa 18 Kunitachi 24 Akiruno 34 Yokota 54 Hamura 23 Itsukaichi

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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 2026-10-21T05:27 UTC.