Air Quality in Kokubunji, Japan

Drizzle
23.7°C · 83.6% humidity
23.7°
Feels 23.7°
61
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
40 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
132 6am
70
69
61 9am
63
66
67 12pm
68
68
69 3pm
69
68
69 6pm
69
69
69 9pm
69
70
70 12am
132
132
132 3am
70
70
Station readings
10
CAMS model adj -14
146
84
83
83
83
84
84
84
84
84
84
83
83
83
83
83
83
84
84
146
146
146
84
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. Current PM2.5 concentration in Kokubunji is 1.1× the WHO 24-hour guideline of 15 µg/m³.

83.6%
Humidity
54.5 km/h
Wind NNW
1002.6 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
61
16.67 µg/m³
PM10
51
54.9 µg/m³
050100150200300500

What is the weather forecast for Kokubunji?

Temperature & Precipitation

PM2.5 Trend

6h · 1 station
PM2.516.67 µg/m³ ×1.1 WHO
Moderate
PM1054.9 µg/m³
Moderate
UV INDEX14.9
Extreme
AD 300×250
Station readings (40 stations within 25 km)
16.67
Median
15.34
Average
3.8
Low
29.2
High
PM2.5 µg/m³ · Model: 27.1 · Bias: +10.4

What is the 7-day forecast for Kokubunji?

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
07-28
29.6° 26.3°
12.63 mm
Both models agree Avg diff: 2.9°C

Where are air quality stations near Kokubunji?

78
Ogawacho, Kodaira, Tokyo, Japan (小平市小川町小平市)
2.6 km PM2.5: 24.9 µg/m³
59
Yaho, Kunitachi, Tokyo, Japan (甲州街道国立国立市)
4.5 km PM2.5: 15.9 µg/m³
55
小金井市東町
4.5 km 78.5% RH PM2.5: 14.0 µg/m³ PM10: 29.0 µg/m³
70
府中市四谷
5.1 km 81.6% RH PM2.5: 21.0 µg/m³ PM10: 36.0 µg/m³
61
西東京市南町
6.4 km 79.2% RH PM2.5: 17.0 µg/m³ PM10: 33.0 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
97
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
6.6 km PM2.5: 34.0 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
80
Sekimae, Musashino, Tokyo, Japan (武蔵野市関前武蔵野市)
7.5 km PM2.5: 25.9 µg/m³
68
Shimorenjaku, Mitaka, Tokyo, Japan (連雀通り下連雀三鷹市)
8.1 km PM2.5: 20.2 µg/m³

What cities are near Kokubunji?

62 Kodaira 60 Fuchū 58 Koganei 64 Kunitachi 60 Tachikawa 71 Higashimurayama 62 Nishi-Tokyo-shi 61 Musashimurayama 62 Tanashichō 59 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 2026-07-22T00:24 UTC.