What is the air quality in Kōshū today?

The current Air Quality Index (AQI) in Kōshū is 21 (Good). PM2.5 concentration is 5.0 µg/m³.

What is the temperature in Kōshū right now?

The current temperature in Kōshū is 16.3°C (feels like 16.3°C). Humidity is 96.4% and wind speed is 25.9 km/h.

Is it safe to go outside in Kōshū?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Kōshū, Japan

Drizzle

16.3°C · 96.4% humidity

16.3°

Feels 16.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

24 4pm

21 7pm

24 10pm

24 1am

24 4am

24 7am

24 10am

24 1pm

Air Quality Index Trend

45h · 21 stn

View full history →

Kōshū'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.

96.4%

Humidity

25.9 km/h

Wind ENE

1011.9 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.0 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Kōshū?

Temperature & Precipitation

PM2.5 Trend

45h · 21 stations

PM2.55.0 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (3 stations within 25 km)

5.0

Median

5.03

Average

4.8

Low

5.3

High

PM2.5 µg/m³ · Model: 5.9 · Bias: +0.9

What is the 7-day forecast for Kōshū?

09-05

21.3° 16.3°

6.75 mm

09-06

24.9° 16.7°

1.56 mm

09-07

24.1° 17.5°

1.44 mm

09-08

22.5° 15.8°

8.62 mm

09-09

20.3° 15.6°

3.75 mm

09-10

20.3° 18.3°

5.31 mm

09-11

23.8° 16.2°

5.75 mm

Both models agree Avg diff: 2.9°C

Where are air quality stations near Kōshū?

Enzankamishiogo, Koshu, Yamanashi, Japan (東山梨甲州市)

5.7 km PM2.5: 13.1 µg/m³

Enzankamishiogo, Koshu, Yamanashi, Japan (東山梨甲州市)

5.7 km PM2.5: 5.0 µg/m³

Otsukimachi Hanasaki, Otsuki, Yamanashi, Japan (大月大月市)

19.6 km PM2.5: 6.7 µg/m³

Kokubo, Kofu, Yamanashi, Japan (国母自排甲府市)

21.6 km PM2.5: 13.5 µg/m³

Kokubo, Kofu, Yamanashi, Japan (国母自排甲府市)

21.6 km PM2.5: 5.3 µg/m³

What cities are near Kōshū?

21 Enzan 21 Yamanashi 22 Isawa 22 Fuefuki 22 Kofu 20 Ōtsuki 20 Tsuru 22 Shōwa 22 Kai 22 Ryūō

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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 2026-09-05T10:04 UTC.