Air Quality in Kosai, Japan

Cloudy
24.9°C · 84.1% humidity
24.9°
Feels 24.9°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
9 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
23 6am
23
23
21 9am
25
25
32 12pm
32
32
32 3pm
32
32
32 6pm
32
52
52 9pm
32
25
25 12am
25
25
25 3am
25
25
Station readings 5h ago
AQI 17
PM2.5 4.1 µg/m³ · 5h ago
CAMS model adj -2
25
25
25
27
27
27
34
34
34
34
34
34
34
34
54
54
34
27
27
27
27
27
27
27
AD 728×90

Air Quality Index Trend

43h · 17 stn

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.

84.1%
Humidity
38.0 km/h
Wind ESE
1008.3 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
21
4.95 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Kosai?

Temperature & Precipitation

PM2.5 Trend

43h · 17 stations
PM2.54.95 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (9 stations within 25 km)
4.95
Median
4.87
Average
3.1
Low
7.4
High
PM2.5 µg/m³ · Model: 5.9 · Bias: +0.9

What is the 7-day forecast for Kosai?

08-03
32.8° 24.9°
2.12 mm
08-04
31.5° 25.1°
9.94 mm
08-05
29.9° 24.2°
2.25 mm
08-06
28.1° 26.3°
9.63 mm
08-07
31.4° 28.2°
0.38 mm
08-08
36.4° 26.7°
9.56 mm
08-09
36.3° 24.3°
Both models agree Avg diff: 2.5°C

Where are air quality stations near Kosai?

25
Kibi, Kosai, Shizuoka, Japan (湖西市役所湖西市)
2.2 km PM2.5: 6.0 µg/m³
21
Oiwacho, Toyohashi, Aichi, Japan (二川豊橋市)
7.0 km PM2.5: 5.0 µg/m³
21
Mikkabicho Mikkabi, Shizuoka, Japan (三ヶ日浜松市北区)
11.8 km PM2.5: 5.0 µg/m³
21
Azumacho, Toyohashi, Aichi, Japan (吾妻豊橋市)
12.1 km PM2.5: 5.0 µg/m³
30
Noyoricho, Toyohashi, Aichi, Japan (野依豊橋市)
12.1 km PM2.5: 7.2 µg/m³
25
Kamigayachō, Shizuoka-ken, Japan (西部測定局浜松市西区)
13.8 km PM2.5: 6.0 µg/m³
21
Hamamatsu (浜松)
18.6 km PM2.5: 5.0 µg/m³
38
豊川市御津南部小学校
21.7 km PM2.5: 9.0 µg/m³ PM10: 15.0 µg/m³
25
Hōgawachō, Shizuoka-ken, Japan (東南部測定局浜松市南区)
22.2 km PM2.5: 6.0 µg/m³
21
Anshincho, Shizuoka Prefecture, Japan (浜松環状線浜松市東区)
24.4 km PM2.5: 5.0 µg/m³

What cities are near Kosai?

20 Arai 13 Toyohashi 12 Toyokawa 12 Kozakai-chō 22 Hamamatsu 15 Shinshiro 15 Tahara 21 Hamakita 12 Iwata 10 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 2026-08-08T00:55 UTC.