Air Quality in Koga, Japan

Windy
23.1°C · 66.6% humidity
23.1°
Feels 23.1°
23
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
54 3am
54
54
23 6am
32
38
43 9am
46
48
50 12pm
51
52
52 3pm
53
53
53 6pm
54
54
34 9pm
27
27
25 12am
25
25
AD 728×90

Air Quality Index Trend

47h · 45 stn

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. Current PM2.5 concentration in Koga is 1.1× the WHO annual guideline of 5 µg/m³.

66.6%
Humidity
81.5 km/h
Wind S
996.8 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
23
5.49 µg/m³
PM10▲
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Koga?

Temperature & Precipitation

PM2.5 Trend

47h · 45 stations
PM2.55.49 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (6 stations within 25 km)
5.49
Median
5.32
Average
4.1
Low
7.7
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +8.0

What is the 7-day forecast for Koga?

05-28
33.2° 16.8°
0.06 mm
05-29
26.1° 20.7°
1.06 mm
05-30
26.3° 19.3°
1.38 mm
05-31
28.7° 21.2°
0.19 mm
06-01
29.0° 21.8°
06-02
28.5° 21.2°
06-03
30.2° 24.3°
0.31 mm
Both models agree Avg diff: 3.6°C

Where are air quality stations near Koga?

21
Shimoono, Koga, Ibaraki, Japan (古河市役所古河市)
2.6 km PM2.5: 5.0 µg/m³
8
Honcho, Kuki, Saitama, Japan (久喜本町自排久喜市)
12.8 km PM2.5: 1.9 µg/m³
51
Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)
13.4 km PM2.5: 12.1 µg/m³
9
Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)
13.4 km PM2.5: 2.2 µg/m³
53
Fujiishimogumi, Hanyū-shi, Saitama-ken, Japan (羽生羽生市)
14.4 km PM2.5: 13.1 µg/m³
70
Kirigasaku, Noda, Chiba, Japan (野田桐ケ作野田市)
17.4 km PM2.5: 21.1 µg/m³
38
Gakuendai, Saitama-ken, Japan (宮代南埼玉郡宮代町)
17.6 km PM2.5: 9.1 µg/m³
11
Kamitanadare, Kazo-shi, Saitama-ken, Japan (環境科学国際センター加須市)
17.8 km PM2.5: 2.6 µg/m³
21
Nakamachi, Tatebayashi, Gunma, Japan (館林市民センター館林市)
18.1 km PM2.5: 5.0 µg/m³
64
Shimotsumaotsu, Shimotsuma-shi, Ibaraki-ken, Japan (下妻下妻市)
21.9 km PM2.5: 18.3 µg/m³

What cities are near Koga?

24 Nogi 24 Kurihashi 23 Fujioka 24 Washinomiya 22 Sakai 21 Satte 29 Kazo 22 Kukichūō 32 Oyama 24 Kisai
Get AQI alerts for Koga

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-28T21:35 UTC.