What is the air quality in Koga today?

The current Air Quality Index (AQI) in Koga is 43 (Good). PM2.5 concentration is 10.26 µg/m³.

What is the temperature in Koga right now?

The current temperature in Koga is 16.1°C (feels like 16.1°C). Humidity is 68.5% and wind speed is 15.7 km/h.

Is it safe to go outside in Koga?

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

Air Quality in Koga, Japan

Drizzle

16.1°C · 68.5% humidity

16.1°

Feels 16.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 47h ago

AQI 49

PM2.5 11.8 µg/m³ · 47h ago

Air Quality Index Trend

45h · 50 stn

View full history →

Koga'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.

68.5%

Humidity

15.7 km/h

Wind ENE

1021.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

10.26 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Koga?

Temperature & Precipitation

PM2.5 Trend

45h · 50 stations

PM2.510.26 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (4 stations within 25 km)

10.26

Median

12.02

Average

9.1

Low

16.9

High

PM2.5 µg/m³ · Model: 6.5 · Bias: -3.8

What is the 7-day forecast for Koga?

10-21

21.1° 16.1°

0.25 mm

10-22

23.7° 16.6°

10-23

21.6° 15.1°

10-24

21.4° 17.1°

0.25 mm

10-25

19.6° 14.0°

4.69 mm

10-26

22.0° 14.0°

10-27

18.8° 14.9°

Both models agree Avg diff: 2.9°C

Where are air quality stations near Koga?

Shimoono, Koga, Ibaraki, Japan (古河市役所古河市)

2.6 km PM2.5: 9.1 µg/m³

Satte, Satte, Saitama, Japan (幸手幸手市)

12.1 km PM2.5: 10.1 µg/m³

Honcho, Kuki, Saitama, Japan (久喜本町自排久喜市)

12.8 km PM2.5: 12.0 µg/m³

Fujiokamachiko, Tochigi, Tochigi, Japan (栃木市藤岡総合文化センター栃木市)

13.6 km PM2.5: 7.2 µg/m³

Kirigasaku, Noda, Chiba, Japan (野田桐ケ作野田市)

17.4 km PM2.5: 10.1 µg/m³

Shimotsumaotsu, Shimotsuma-shi, Ibaraki-ken, Japan (下妻下妻市)

21.9 km PM2.5: 16.9 µg/m³

Hirayanagimachi, Tochigi, Tochigi, Japan (栃木市平柳町交差点栃木市)

23.3 km PM2.5: 7.2 µg/m³

Yahara, Kasukabe-shi, Saitama-ken, Japan (春日部春日部市)

23.6 km PM2.5: 9.1 µg/m³

Tanaka, Shimono, Tochigi, Japan (下野市南河内庁舎下野市)

26.6 km PM2.5: 0.7 µg/m³

Tanaka, Shimono, Tochigi, Japan (下野市南河内庁舎下野市)

26.6 km PM2.5: 4.6 µg/m³

What cities are near Koga?

44 Nogi 46 Kurihashi 47 Fujioka 49 Washinomiya 42 Sakai 45 Satte 51 Kazo 50 Kukichūō 52 Oyama 51 Kisai

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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 2026-10-21T05:26 UTC.