Air Quality in Kokubunji, Japan

Windy
22.8°C · 66.3% humidity
22.8°
Feels 22.8°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
48 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
16 4am
23
43
27 7am
32
35
37 10am
39
40
41 1pm
41
54
54 4pm
54
72
73 7pm
72
55
43 10pm
43
43
43 1am
23
23
Station readings
41
48
25
11
CAMS model adj -11
27
34
54
54
54
54
54
54
54
54
54
66
66
66
83
84
83
66
54
54
54
54
34
34
AD 728×90

Air Quality Index Trend

31h · 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 1.3× the WHO annual guideline of 5 µg/m³.

66.3%
Humidity
152.4 km/h
Wind S
998.4 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
27
6.41 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Kokubunji?

Temperature & Precipitation

PM2.5 Trend

31h · 1 station
PM2.56.41 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (48 stations within 25 km)
6.41
Median
7.54
Average
4.0
Low
11.0
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +4.4

What is the 7-day forecast for Kokubunji?

05-28
29.9° 15.9°
05-29
24.9° 19.9°
0.06 mm
05-30
24.8° 19.7°
0.44 mm
05-31
27.1° 20.3°
06-01
28.2° 21.4°
06-02
27.4° 20.8°
0.06 mm
06-03
28.1° 23.1°
0.06 mm
Both models agree Avg diff: 3.1°C

Where are air quality stations near Kokubunji?

5
Ogawacho, Kodaira, Tokyo, Japan (小平市小川町小平市)
2.6 km PM2.5: 1.2 µg/m³
9
Yaho, Kunitachi, Tokyo, Japan (甲州街道国立国立市)
4.5 km PM2.5: 2.2 µg/m³
–
小金井市東町
4.5 km 99.5% RH
33
府中市四谷
5.1 km 98.4% RH PM2.5: 8.0 µg/m³ PM10: 11.0 µg/m³
17
西東京市南町
6.4 km 99.5% RH PM2.5: 4.0 µg/m³ PM10: 8.0 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
55
Ochikawa, Hino, Tokyo, Japan (川崎街道百草園日野市)
6.6 km PM2.5: 14.0 µg/m³
34
Chuocho, Higashikurume, Tokyo, Japan (小金井街道東久留米東久留米市)
6.6 km PM2.5: 8.2 µg/m³
10
Sekimae, Musashino, Tokyo, Japan (武蔵野市関前武蔵野市)
7.5 km PM2.5: 2.4 µg/m³
45
Shimorenjaku, Mitaka, Tokyo, Japan (連雀通り下連雀三鷹市)
8.1 km PM2.5: 10.8 µg/m³

What cities are near Kokubunji?

22 Kodaira 29 Fuchū 26 Koganei 32 Kunitachi 31 Tachikawa 43 Higashimurayama 18 Nishi-Tokyo-shi 32 Musashimurayama 20 Tanashichō 23 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 2026-05-28T22:54 UTC.