Air Quality in Hachiōji, Japan

Overcast
22.1°C · 91.2% humidity
22.1°
Feels 22.1°
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
15 7am
15
15
22 10am
22
42
42 1pm
42
42
42 4pm
42
42
42 7pm
42
42
42 10pm
42
42
54 1am
54
42
42 4am
42
42
Station readings
19
CAMS model adj -12
27
27
27
34
34
54
54
54
54
54
54
54
54
54
54
54
54
54
66
66
54
54
54
54
AD 728×90

Air Quality Index Trend

3h · 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.

91.2%
Humidity
4.7 km/h
Wind NW
1010.1 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
22
5.15 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Hachiōji?

Temperature & Precipitation

PM2.5 Trend

3h · 1 station
PM2.55.15 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (5 stations within 25 km)
5.15
Median
6.84
Average
2.4
Low
14.0
High
PM2.5 µg/m³ · Model: 6.5 · Bias: +1.4

What is the 7-day forecast for Hachiōji?

08-03
24.6° 20.9°
10.06 mm
08-04
31.7° 23.1°
0.88 mm
08-05
28.1° 23.4°
7.37 mm
08-06
28.2° 23.9°
48.94 mm
08-07
33.6° 22.9°
38.62 mm
08-08
31.3° 23.3°
46.69 mm
08-09
33.2° 20.3°
2.87 mm
Both models agree Avg diff: 2.6°C

Where are air quality stations near Hachiōji?

11
Hachioji (八王子)
1.4 km PM2.5: 2.6 µg/m³
42
Hachioji (八王子)
1.4 km PM2.5: 10.1 µg/m³
43
Katakuramachi, Hachioji, Tokyo, Japan (八王子市片倉町八王子市)
2.2 km PM2.5: 10.3 µg/m³
33
八王子市大楽寺町
3.3 km 67.9% RH PM2.5: 8.0 µg/m³ PM10: 16.0 µg/m³
42
Tatemachi, Hachioji, Tokyo, Japan (八王子市館町八王子市)
4.5 km PM2.5: 10.1 µg/m³
38
Honchō, Fussa-shi, Tōkyō-to, Japan (福生市本町福生市)
8.9 km PM2.5: 9.1 µg/m³
25
Izumicho, Tachikawa, Tokyo, Japan (立川市泉町立川市)
9.7 km PM2.5: 6.0 µg/m³
29
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
10.1 km PM2.5: 7.0 µg/m³
25
Sagamihara (相模原)
10.4 km PM2.5: 6.0 µg/m³
25
府中市四谷
10.7 km 78.5% RH PM2.5: 6.0 µg/m³ PM10: 14.0 µg/m³

What cities are near Hachiōji?

16 Aihara 18 Hino 26 Akishima 32 Fussa 24 Tachikawa 20 Kunitachi 36 Akiruno 29 Yokota 37 Hamura 36 Itsukaichi
Get AQI alerts for Hachiōji

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T01:58 UTC.