Air Quality in Kokubunji, Japan

Drizzle
23.7°C · 83.6% humidity
23.7°
Feels 23.7°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
30 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
87 5am
149
87
53 8am
62
69
75 11am
78
81
83 2pm
84
85
84 5pm
85
85
85 8pm
86
86
87 11pm
87
149
149 2am
149
87
Station readings
10
CAMS model adj +3
84
146
84
83
83
83
84
84
84
84
84
84
83
83
83
83
83
83
84
84
146
146
146
84
AD 728×90

Air Quality Index Trend

6h · 1 stn

Kokubunji'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.

83.6%
Humidity
54.5 km/h
Wind NNW
1002.6 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
53
13.22 µg/m³
PM10
44
48.05 µg/m³
050100150200300500

What is the weather forecast for Kokubunji?

Temperature & Precipitation

PM2.5 Trend

6h · 1 station
PM2.513.22 µg/m³ ✓ WHO
Moderate
PM1048.05 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (30 stations within 25 km)
13.22
Median
14.29
Average
2.4
Low
26.8
High
PM2.5 µg/m³ · Model: 23.15 · Bias: +9.9

What is the 7-day forecast for Kokubunji?

07-21
33.4° 22.1°
14.19 mm
07-22
30.2° 23.7°
3.0 mm
07-23
27.8° 22.1°
0.56 mm
07-24
29.8° 23.6°
1.56 mm
07-25
32.9° 23.6°
07-26
30.3° 26.1°
0.13 mm
07-27
33.3° 24.9°
9.94 mm
Both models agree Avg diff: 2.9°C

Where are air quality stations near Kokubunji?

19
Ogawacho, Kodaira, Tokyo, Japan (小平市小川町小平市)
2.6 km PM2.5: 4.6 µg/m³
30
Yaho, Kunitachi, Tokyo, Japan (甲州街道国立国立市)
4.5 km PM2.5: 7.2 µg/m³
53
小金井市東町
4.5 km 93.1% RH PM2.5: 13.0 µg/m³ PM10: 35.0 µg/m³
70
府中市四谷
5.1 km 84.2% RH PM2.5: 21.0 µg/m³ PM10: 35.0 µg/m³
57
西東京市南町
6.4 km 86.9% RH PM2.5: 15.0 µg/m³ PM10: 36.0 µg/m³
47
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
6.6 km PM2.5: 11.3 µg/m³
30
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
6.6 km PM2.5: 7.2 µg/m³
15
Chuocho, Higashikurume, Tokyo, Japan (小金井街道東久留米東久留米市)
6.6 km PM2.5: 3.6 µg/m³
38
Sekimae, Musashino, Tokyo, Japan (武蔵野市関前武蔵野市)
7.5 km PM2.5: 9.1 µg/m³
23
Shimorenjaku, Mitaka, Tokyo, Japan (連雀通り下連雀三鷹市)
8.1 km PM2.5: 5.5 µg/m³

What cities are near Kokubunji?

49 Kodaira 56 Fuchū 54 Koganei 56 Kunitachi 54 Tachikawa 41 Higashimurayama 49 Nishi-Tokyo-shi 48 Musashimurayama 48 Tanashichō 41 Higashikurume
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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 2026-07-21T23:17 UTC.