Air Quality in Koga, Japan

Cloudy
25.6°C · 74.3% humidity
25.6°
Feels 25.6°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
16 6am
16
16
19 9am
36
36
36 12pm
36
36
36 3pm
36
36
36 6pm
36
36
48 9pm
36
36
36 12am
36
36
36 3am
36
36
Station readings 14h ago
AQI 52
PM2.5 12.6 µg/m³ · 14h ago
CAMS model adj -18
34
34
34
34
54
54
54
54
54
54
54
54
54
54
54
66
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

44h · 58 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.

74.3%
Humidity
26.9 km/h
Wind E
1009.5 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
19
4.6 µg/m³
PM10▲
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Koga?

Temperature & Precipitation

PM2.5 Trend

44h · 58 stations
PM2.54.6 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (4 stations within 25 km)
4.6
Median
9.05
Average
3.1
Low
15.0
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +3.6

What is the 7-day forecast for Koga?

08-03
27.6° 22.2°
11.5 mm
08-04
36.5° 24.7°
4.75 mm
08-05
33.1° 25.1°
3.31 mm
08-06
30.0° 25.7°
25.06 mm
08-07
38.2° 25.3°
11.94 mm
08-08
34.8° 26.2°
52.62 mm
08-09
35.5° 22.2°
0.44 mm
Both models agree Avg diff: 3.2°C

Where are air quality stations near Koga?

17
Shimoono, Koga, Ibaraki, Japan (古河市役所古河市)
2.6 km PM2.5: 4.1 µg/m³
21
Satte, Satte, Saitama, Japan (幸手幸手市)
12.1 km PM2.5: 5.0 µg/m³
21
Satte, Satte, Saitama, Japan (幸手幸手市)
12.1 km PM2.5: 5.0 µg/m³
21
Honcho, Kuki, Saitama, Japan (久喜本町自排久喜市)
12.8 km PM2.5: 5.0 µg/m³
18
Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)
13.4 km PM2.5: 4.3 µg/m³
21
Kirigasaku, Noda, Chiba, Japan (野田桐ケ作野田市)
17.4 km PM2.5: 5.0 µg/m³
9
Kamitanadare, Kazo-shi, Saitama-ken, Japan (環境科学国際センター加須市)
17.8 km PM2.5: 2.2 µg/m³
30
Nakamachi, Tatebayashi, Gunma, Japan (館林市民センター館林市)
18.1 km PM2.5: 7.2 µg/m³
25
Chuo, Konosu, Saitama, Japan (鴻巣鴻巣市)
21.8 km PM2.5: 6.0 µg/m³
61
Irifunecho, Tochigi, Tochigi, Japan (栃木市役所栃木市)
22.1 km PM2.5: 16.9 µg/m³

What cities are near Koga?

20 Nogi 34 Kurihashi 32 Fujioka 51 Washinomiya 33 Sakai 42 Satte 56 Kazo 47 Kukichūō 16 Oyama 56 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 2026-08-08T00:55 UTC.