Air Quality in Koga, Japan

Drizzle
22.7°C · 88.5% humidity
22.7°
Feels 22.7°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
13 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
19 4pm
19
19
19 7pm
19
19
19 10pm
19
19
19 1am
17
17
17 4am
17
17
17 7am
19
19
19 10am
26
26
26 1pm
46
46
Station readings 10h ago
AQI 16
PM2.5 3.9 µg/m³ · 10h ago
CAMS model adj -8
27
27
27
27
27
27
27
27
27
27
25
25
25
25
25
25
27
27
27
34
34
34
54
54
AD 728×90

Air Quality Index Trend

45h · 71 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.

88.5%
Humidity
40.8 km/h
Wind NE
1010.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
19
4.47 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Koga?

Temperature & Precipitation

PM2.5 Trend

45h · 71 stations
PM2.54.47 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (13 stations within 25 km)
4.47
Median
5.75
Average
2.2
Low
11.0
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +1.7

What is the 7-day forecast for Koga?

09-05
28.8° 20.9°
14.81 mm
09-06
29.6° 22.4°
6.06 mm
09-07
31.3° 22.8°
1.19 mm
09-08
29.5° 22.2°
10.06 mm
09-09
27.5° 22.3°
4.5 mm
09-10
27.3° 23.5°
4.19 mm
09-11
32.4° 22.1°
13.88 mm
Both models agree Avg diff: 3.3°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
Marubayashi, Tochigi, Japan (野木町役場下都賀郡野木町)
5.7 km PM2.5: 5.0 µg/m³
17
Marubayashi, Tochigi, Japan (野木町役場下都賀郡野木町)
5.7 km PM2.5: 4.1 µg/m³
34
Satte, Satte, Saitama, Japan (幸手幸手市)
12.1 km PM2.5: 8.2 µg/m³
30
Satte, Satte, Saitama, Japan (幸手幸手市)
12.1 km PM2.5: 7.2 µg/m³
30
Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市)
13.4 km PM2.5: 7.2 µg/m³
30
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
25
Ezura, Kuki, Saitama, Japan (久喜久喜市)
14.0 km PM2.5: 6.0 µg/m³
21
Kirigasaku, Noda, Chiba, Japan (野田桐ケ作野田市)
17.4 km PM2.5: 5.0 µg/m³
17
Kirigasaku, Noda, Chiba, Japan (野田桐ケ作野田市)
17.4 km PM2.5: 4.1 µg/m³

What cities are near Koga?

17 Nogi 24 Kurihashi 21 Fujioka 25 Washinomiya 23 Sakai 34 Satte 29 Kazo 25 Kukichūō 22 Oyama 27 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 2026-09-05T10:26 UTC.