What is the air quality in Koga today?

The current Air Quality Index (AQI) in Koga is 19 (Good). PM2.5 concentration is 4.64 µg/m³.

What is the temperature in Koga right now?

The current temperature in Koga is 22.8°C (feels like 22.8°C). Humidity is 60.6% and wind speed is 7.4 km/h.

Is it safe to go outside in Koga?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 5.9 (High).

Air Quality in Koga, Japan

Partly Cloudy

22.8°C · 60.6% humidity

22.8°

Feels 22.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

8 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

47h · 34 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.

60.6%

Humidity

7.4 km/h

Wind SE

1015.2 hPa

Pressure

5.9

UV High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

4.64 µg/m³

PM10▲

27.45 µg/m³

050100150200300500

What is the weather forecast for Koga?

Temperature & Precipitation

PM2.5 Trend

47h · 34 stations

PM2.54.64 µg/m³ ✓ WHO

Good

PM1027.45 µg/m³

Good

UV INDEX5.9

High

Station readings (8 stations within 25 km)

4.64

Median

4.8

Average

2.2

Low

10.1

High

PM2.5 µg/m³ · Model: 12.6 · Bias: +8.0

What is the 7-day forecast for Koga?

06-08

29.2° 19.4°

15.38 mm

06-09

26.1° 22.8°

06-10

29.1° 18.7°

26.69 mm

06-11

27.8° 20.5°

1.06 mm

06-12

25.9° 19.8°

1.0 mm

06-13

33.8° 22.6°

0.06 mm

06-14

32.4° 18.4°

12.19 mm

Both models agree Avg diff: 3.4°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: 4.1 µg/m³

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

12.8 km PM2.5: 1.9 µg/m³

Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)

13.4 km PM2.5: 7.0 µg/m³

Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)

13.4 km PM2.5: 6.0 µg/m³

Fujiishimogumi, Hanyū-shi, Saitama-ken, Japan (羽生羽生市)

14.4 km PM2.5: 6.0 µg/m³

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

17.4 km PM2.5: 5.0 µg/m³

Gakuendai, Saitama-ken, Japan (宮代南埼玉郡宮代町)

17.6 km PM2.5: 7.2 µg/m³

Kamitanadare, Kazo-shi, Saitama-ken, Japan (環境科学国際センター加須市)

17.8 km PM2.5: 12.1 µg/m³

Nakamachi, Tatebayashi, Gunma, Japan (館林市民センター館林市)

18.1 km PM2.5: 10.1 µg/m³

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

21.9 km PM2.5: 4.1 µg/m³

What cities are near Koga?

20 Nogi 19 Kurihashi 18 Fujioka 20 Washinomiya 18 Sakai 12 Satte 16 Kazo 21 Kukichūō 21 Oyama 13 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 2026-06-08T23:10 UTC.