Air Quality in Hachiōji, Japan

Cloudy
20.2°C · 74.0% humidity
20.2°
Feels 20.2°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
28 stations

Nearby Monitoring Stations

AQI Forecast
27 5am
54
54
28 8am
35
14
24 11am
27
49
30 2pm
51
52
53 5pm
53
53
66 8pm
83
83
83 11pm
83
83
83 2am
83
66
AD 728×90

Air Quality Index Trend

47h · 67 stn

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.

74.0%
Humidity
12.8 km/h
Wind E
1015.7 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
28
6.61 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Hachiōji?

Temperature & Precipitation

PM2.5 Trend

47h · 67 stations
PM2.56.61 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (28 stations within 25 km)
6.61
Median
4.11
Average
1.0
Low
8.6
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +6.9

What is the 7-day forecast for Hachiōji?

06-08
25.4° 15.2°
8.63 mm
06-09
21.8° 19.3°
0.44 mm
06-10
24.9° 16.2°
7.13 mm
06-11
24.6° 17.8°
0.38 mm
06-12
23.7° 17.5°
2.0 mm
06-13
29.2° 18.4°
2.0 mm
06-14
27.1° 17.2°
41.75 mm
Both models agree Avg diff: 2.2°C

Where are air quality stations near Hachiōji?

21
Hachioji (八王子)
1.4 km PM2.5: 5.0 µg/m³
23
Katakuramachi, Hachioji, Tokyo, Japan (八王子市片倉町八王子市)
2.2 km PM2.5: 5.5 µg/m³
12
八王子市大楽寺町
3.3 km 95.5% RH PM2.5: 3.0 µg/m³ PM10: 9.0 µg/m³
34
Tatemachi, Hachioji, Tokyo, Japan (八王子市館町八王子市)
4.5 km PM2.5: 8.2 µg/m³
34
Honchō, Fussa-shi, Tōkyō-to, Japan (福生市本町福生市)
8.9 km PM2.5: 8.2 µg/m³
42
Honchō, Fussa-shi, Tōkyō-to, Japan (福生市本町福生市)
8.9 km PM2.5: 10.1 µg/m³
51
Nakano, Kanagawa, Japan (津久井相模原市緑区)
9.8 km PM2.5: 12.1 µg/m³
18
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
10.1 km PM2.5: 4.3 µg/m³
9
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
10.1 km PM2.5: 2.2 µg/m³
25
Sagamihara (相模原)
10.4 km PM2.5: 6.0 µg/m³

What cities are near Hachiōji?

18 Aihara 18 Hino 21 Akishima 29 Fussa 19 Tachikawa 20 Kunitachi 20 Akiruno 22 Yokota 25 Hamura 18 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 2026-06-08T23:21 UTC.