What is the air quality in Kosai today?

The current Air Quality Index (AQI) in Kosai is 18 (Good). PM2.5 concentration is 4.35 µg/m³.

What is the temperature in Kosai right now?

The current temperature in Kosai is 26.0°C (feels like 26.0°C). Humidity is 69.5% and wind speed is 89.2 km/h.

Is it safe to go outside in Kosai?

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

Air Quality in Kosai, Japan

Windy

26.0°C · 69.5% humidity

26.0°

Feels 26.0°

Good

Air quality is satisfactory. Enjoy outdoor activities.

14 stations

Nearby Monitoring Stations

AQI Forecast

24 4pm

18 7pm

22 10pm

23 1am

24 4am

24 7am

24 10am

24 1pm

Air Quality Index Trend

45h · 17 stn

View full history →

Kosai'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.

69.5%

Humidity

89.2 km/h

Wind E

1006.7 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.35 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Kosai?

Temperature & Precipitation

PM2.5 Trend

45h · 17 stations

PM2.54.35 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (14 stations within 25 km)

4.35

Median

5.59

Average

1.9

Low

9.1

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +1.5

What is the 7-day forecast for Kosai?

09-05

32.2° 23.8°

4.0 mm

09-06

30.3° 24.5°

1.81 mm

09-07

28.7° 24.3°

0.13 mm

09-08

27.7° 23.4°

19.88 mm

09-09

27.4° 24.0°

0.56 mm

09-10

33.4° 24.7°

1.13 mm

09-11

29.4° 23.2°

3.63 mm

Both models agree Avg diff: 2.0°C

Where are air quality stations near Kosai?

Kibi, Kosai, Shizuoka, Japan (湖西市役所湖西市)

2.2 km PM2.5: 4.1 µg/m³

Mikkabicho Mikkabi, Shizuoka, Japan (三ヶ日浜松市北区)

11.8 km PM2.5: 5.0 µg/m³

Azumacho, Toyohashi, Aichi, Japan (吾妻豊橋市)

12.1 km PM2.5: 5.0 µg/m³

Noyoricho, Toyohashi, Aichi, Japan (野依豊橋市)

12.1 km PM2.5: 6.7 µg/m³

Kamigayachō, Shizuoka-ken, Japan (西部測定局浜松市西区)

13.8 km PM2.5: 5.0 µg/m³

Kamoe, Shizuoka, Japan (浜松中央測定局浜松市中区)

17.6 km PM2.5: 1.9 µg/m³

Hamamatsu (浜松)

18.6 km PM2.5: 9.1 µg/m³

Aioicho, Shizuoka, Japan (Ｒ−１５０浜松市中区)

20.7 km PM2.5: 3.1 µg/m³

Aioicho, Shizuoka, Japan (Ｒ−１５０浜松市中区)

20.7 km PM2.5: 6.0 µg/m³

Aioicho, Shizuoka, Japan (Ｒ−１５０浜松市中区)

20.7 km PM2.5: 4.1 µg/m³

What cities are near Kosai?

20 Arai 20 Toyohashi 19 Toyokawa 16 Kozakai-chō 28 Hamamatsu 24 Shinshiro 21 Tahara 21 Hamakita 14 Iwata 24 Gamagōri

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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 2026-09-05T10:26 UTC.