Air Quality in Koshigaya, Japan

Cloudy
25.7°C · 73.3% humidity
25.7°
Feels 25.7°
33
Good
Air quality is satisfactory. Enjoy outdoor activities.
13 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
0 7am
0
0
33 10am
29
26
24 1pm
22
21
20 4pm
19
19
19 7pm
19
30
18 10pm
18
18
18 1am
18
18
18 4am
18
18
Station readings
19
CAMS model adj -36
34
34
34
54
54
54
54
54
54
54
54
54
54
54
66
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

21h · 2 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.

73.3%
Humidity
29.7 km/h
Wind E
1009.5 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
33
7.88 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Koshigaya?

Temperature & Precipitation

PM2.5 Trend

21h · 2 stations
PM2.57.88 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (13 stations within 25 km)
7.88
Median
6.96
Average
3.6
Low
14.0
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +0.3

What is the 7-day forecast for Koshigaya?

08-03
28.4° 22.0°
11.69 mm
08-04
35.2° 25.3°
5.25 mm
08-05
32.9° 25.2°
3.56 mm
08-06
31.0° 26.5°
13.88 mm
08-07
36.6° 24.8°
13.31 mm
08-08
33.4° 27.0°
45.63 mm
08-09
34.6° 22.7°
0.19 mm
Both models agree Avg diff: 3.3°C

Where are air quality stations near Koshigaya?

30
Higashikoshigaya, Koshigaya, Saitama, Japan (越谷市東越谷越谷市)
0.9 km PM2.5: 7.2 µg/m³
25
Sasakubo, Saitama, Japan (さいたま市城南さいたま市岩槻区)
6.2 km PM2.5: 6.0 µg/m³
12
Chuo, Yashio, Saitama, Japan (八潮八潮市)
8.8 km PM2.5: 2.9 µg/m³
25
Noda, Noda-shi, Chiba-ken, Japan (野田市野田野田市)
9.4 km PM2.5: 6.0 µg/m³
34
Noda, Noda-shi, Chiba-ken, Japan (野田市野田野田市)
9.4 km PM2.5: 8.2 µg/m³
8
Yahara, Kasukabe-shi, Saitama-ken, Japan (春日部春日部市)
9.9 km PM2.5: 1.9 µg/m³
50
Mikura, Saitama, Japan (さいたま市片柳さいたま市見沼区)
10.6 km PM2.5: 12.0 µg/m³
41
Mikura, Saitama, Japan (さいたま市片柳さいたま市見沼区)
10.6 km PM2.5: 9.8 µg/m³
46
Heiwadai, Nagareyama-shi, Chiba-ken, Japan (流山平和台流山市)
10.9 km PM2.5: 11.0 µg/m³
29
Heiwadai, Nagareyama-shi, Chiba-ken, Japan (流山平和台流山市)
10.9 km PM2.5: 7.0 µg/m³

What cities are near Koshigaya?

31 Matsubushi 27 Yoshikawa 28 Sōka 32 Hatogaya-honchō 27 Yashio 28 Toneri 21 Noda 25 Misato, Saitama 27 Takenotsuka 25 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 2026-08-08T01:59 UTC.