What is the air quality in Kokubunji today?

The current Air Quality Index (AQI) in Kokubunji is 22 (Good). PM2.5 concentration is 5.25 µg/m³.

What is the temperature in Kokubunji right now?

The current temperature in Kokubunji is 15.3°C (feels like 15.3°C). Humidity is 75.2% and wind speed is 39.3 km/h.

Is it safe to go outside in Kokubunji?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Kokubunji, Japan

Drizzle

15.3°C · 75.2% humidity

15.3°

Feels 15.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

33 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 6h ago

AQI 69

PM2.5 20.6 µg/m³ · 6h ago

Air Quality Index Trend

41h · 1 stn

View full history →

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.

75.2%

Humidity

39.3 km/h

Wind N

1021.6 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.25 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Kokubunji?

Temperature & Precipitation

PM2.5 Trend

41h · 1 station

PM2.55.25 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (33 stations within 25 km)

5.25

Median

5.93

Average

0.5

Low

21.1

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +0.6

What is the 7-day forecast for Kokubunji?

10-21

21.6° 15.3°

0.75 mm

10-22

23.3° 18.1°

0.06 mm

10-23

22.5° 15.7°

10-24

21.9° 16.8°

0.94 mm

10-25

19.8° 14.2°

5.63 mm

10-26

20.7° 15.0°

10-27

19.2° 15.1°

0.25 mm

Both models agree Avg diff: 3.1°C

Where are air quality stations near Kokubunji?

Honcho, Koganei, Tokyo, Japan (小金井市本町小金井市)

2.5 km PM2.5: 5.0 µg/m³

Ogawacho, Kodaira, Tokyo, Japan (小平市小川町小平市)

2.6 km PM2.5: 5.0 µg/m³

Yaho, Kunitachi, Tokyo, Japan (甲州街道国立国立市)

4.5 km PM2.5: 4.1 µg/m³

小金井市東町

4.5 km 70.3% RH PM2.5: 5.0 µg/m³ PM10: 11.0 µg/m³

Izumicho, Tachikawa, Tokyo, Japan (立川市泉町立川市)

5.0 km PM2.5: 12.0 µg/m³

府中市四谷

5.1 km 66.3% RH PM2.5: 4.0 µg/m³ PM10: 10.0 µg/m³

Honcho, Higashimurayama, Tokyo, Japan (新青梅街道東村山東村山市)

5.3 km PM2.5: 6.0 µg/m³

Nishitokyo (西東京市)

6.2 km PM2.5: 5.0 µg/m³

西東京市南町

6.4 km 76.4% RH PM2.5: 4.0 µg/m³ PM10: 13.0 µg/m³

Chuocho, Higashikurume, Tokyo, Japan (小金井街道東久留米東久留米市)

6.6 km PM2.5: 6.0 µg/m³

What cities are near Kokubunji?

21 Kodaira 21 Fuchū 21 Koganei 18 Kunitachi 22 Tachikawa 25 Higashimurayama 21 Nishi-Tokyo-shi 25 Musashimurayama 21 Tanashichō 25 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 2026-10-21T05:27 UTC.