Air Quality in Koshigaya, Japan

Windy
23.7°C · 61.8% humidity
23.7°
Feels 23.7°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
50 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
27 3am
27
27
30 6am
27
27
27 9am
27
27
27 12pm
27
27
27 3pm
27
27
27 6pm
27
27
7 9pm
0
0
0 12am
0
0
Station readings
25
41
48
25
CAMS model adj -27
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
34
27
27
25
25
25
AD 728×90

Air Quality Index Trend

31h · 1 stn

Koshigaya'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 Koshigaya is 1.4× the WHO annual guideline of 5 µg/m³.

61.8%
Humidity
152.1 km/h
Wind S
998.1 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
30
7.2 µg/m³
PM10▲
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Koshigaya?

Temperature & Precipitation

PM2.5 Trend

31h · 1 station
PM2.57.2 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (50 stations within 25 km)
7.2
Median
7.63
Average
0.2
Low
13.1
High
PM2.5 µg/m³ · Model: 16.35 · Bias: +9.1

What is the 7-day forecast for Koshigaya?

05-28
31.3° 15.6°
05-29
25.3° 20.6°
05-30
26.6° 20.1°
1.37 mm
05-31
28.4° 21.1°
0.06 mm
06-01
29.1° 21.9°
06-02
26.7° 21.3°
06-03
29.4° 23.8°
Both models agree Avg diff: 2.9°C

Where are air quality stations near Koshigaya?

36
Higashikoshigaya, Koshigaya, Saitama, Japan (越谷市東越谷越谷市)
0.9 km PM2.5: 8.6 µg/m³
50
Higashikoshigaya, Koshigaya, Saitama, Japan (越谷市東越谷越谷市)
0.9 km PM2.5: 12.0 µg/m³
33
Sengendainishi, Koshigaya, Saitama Prefecture, Japan (越谷市千間台西越谷市)
5.2 km PM2.5: 7.9 µg/m³
42
Sengendainishi, Koshigaya, Saitama Prefecture, Japan (越谷市千間台西越谷市)
5.2 km PM2.5: 10.1 µg/m³
42
Hanaguri, Sōka-shi, Saitama-ken, Japan (草加市花栗自排草加市)
5.6 km PM2.5: 10.1 µg/m³
58
Sasakubo, Saitama, Japan (さいたま市城南さいたま市岩槻区)
6.2 km PM2.5: 15.4 µg/m³
36
Mashito, Kasukabe-shi, Saitama-ken, Japan (春日部増戸自排春日部市)
9.0 km PM2.5: 8.6 µg/m³
33
Mashito, Kasukabe-shi, Saitama-ken, Japan (春日部増戸自排春日部市)
9.0 km PM2.5: 7.9 µg/m³
9
Noda, Noda-shi, Chiba-ken, Japan (野田市野田野田市)
9.4 km PM2.5: 2.2 µg/m³
39
Noda, Noda-shi, Chiba-ken, Japan (野田市野田野田市)
9.4 km PM2.5: 9.4 µg/m³

What cities are near Koshigaya?

30 Matsubushi 30 Yoshikawa 24 Sōka 30 Hatogaya-honchō 32 Yashio 29 Toneri 17 Noda 18 Misato, Saitama 31 Takenotsuka 34 Nagareyama
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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 2026-05-28T21:37 UTC.