Air Quality in Hachiōji, Japan

Windy
21.0°C · 73.3% humidity
21.0°
Feels 21.0°
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
32 stations

Nearby Monitoring Stations

AQI Forecast
27 3am
27
27
31 6am
27
25
27 9am
34
34
34 12pm
54
54
54 3pm
54
54
54 6pm
66
66
66 9pm
54
54
54 12am
54
54
AD 728×90

Air Quality Index Trend

48h · 1 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. Current PM2.5 concentration in Hachiōji is 1.5× the WHO annual guideline of 5 µg/m³.

73.3%
Humidity
75.6 km/h
Wind SSE
998.4 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
31
7.4 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Hachiōji?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.57.4 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (32 stations within 25 km)
7.4
Median
6.99
Average
3.6
Low
13.1
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -0.1

What is the 7-day forecast for Hachiōji?

05-28
28.3° 13.5°
0.13 mm
05-29
22.2° 17.2°
0.63 mm
05-30
21.8° 16.1°
0.88 mm
05-31
24.1° 17.0°
06-01
25.5° 18.1°
06-02
24.8° 16.5°
2.5 mm
06-03
26.1° 18.8°
0.56 mm
Both models agree Avg diff: 3.3°C

Where are air quality stations near Hachiōji?

13
Hachioji (八王子)
1.4 km PM2.5: 3.1 µg/m³
34
Katakuramachi, Hachioji, Tokyo, Japan (八王子市片倉町八王子市)
2.2 km PM2.5: 8.2 µg/m³
33
八王子市大楽寺町
3.3 km 94.2% RH PM2.5: 8.0 µg/m³ PM10: 12.0 µg/m³
29
Tatemachi, Hachioji, Tokyo, Japan (八王子市館町八王子市)
4.5 km PM2.5: 7.0 µg/m³
17
Honchō, Fussa-shi, Tōkyō-to, Japan (福生市本町福生市)
8.9 km PM2.5: 4.1 µg/m³
33
Honchō, Fussa-shi, Tōkyō-to, Japan (福生市本町福生市)
8.9 km PM2.5: 7.9 µg/m³
28
Nakano, Kanagawa, Japan (津久井相模原市緑区)
9.8 km PM2.5: 6.7 µg/m³
19
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
10.1 km PM2.5: 4.6 µg/m³
55
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
10.1 km PM2.5: 14.0 µg/m³
42
Sagamihara (相模原)
10.4 km PM2.5: 10.1 µg/m³

What cities are near Hachiōji?

29 Aihara 28 Hino 29 Akishima 25 Fussa 29 Tachikawa 26 Kunitachi 28 Akiruno 29 Yokota 25 Hamura 28 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 2026-05-28T21:37 UTC.