Air Quality in Koshigaya, Japan

Partly Cloudy
22.7°C · 62.0% humidity
22.7°
Feels 22.7°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
26 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
43 5am
43
43
24 8am
17
21
24 11am
26
27
28 2pm
29
30
30 5pm
30
43
43 8pm
43
43
43 11pm
31
31
31 2am
31
11
Station readings
2
CAMS model adj -23
66
66
66
66
54
54
54
54
54
54
54
54
54
54
66
66
66
66
66
54
54
54
54
34
AD 728×90

Air Quality Index Trend

39h · 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.

62.0%
Humidity
18.7 km/h
Wind SSE
1015.4 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
24
5.7 µg/m³
PM10▲
25
27.45 µg/m³
050100150200300500

What is the weather forecast for Koshigaya?

Temperature & Precipitation

PM2.5 Trend

39h · 1 station
PM2.55.7 µg/m³ ✓ WHO
Good
PM1027.45 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (26 stations within 25 km)
5.7
Median
4.91
Average
1.2
Low
10.1
High
PM2.5 µg/m³ · Model: 12.6 · Bias: +6.9

What is the 7-day forecast for Koshigaya?

06-08
28.6° 18.8°
16.0 mm
06-09
24.1° 22.7°
06-10
28.9° 19.6°
9.0 mm
06-11
26.6° 20.1°
0.13 mm
06-12
25.4° 19.7°
1.06 mm
06-13
32.9° 22.0°
1.94 mm
06-14
31.0° 18.6°
16.56 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Koshigaya?

61
Higashikoshigaya, Koshigaya, Saitama, Japan (越谷市東越谷越谷市)
0.9 km PM2.5: 16.9 µg/m³
67
Higashikoshigaya, Koshigaya, Saitama, Japan (越谷市東越谷越谷市)
0.9 km PM2.5: 19.7 µg/m³
17
Sengendainishi, Koshigaya, Saitama Prefecture, Japan (越谷市千間台西越谷市)
5.2 km PM2.5: 4.1 µg/m³
23
Sengendainishi, Koshigaya, Saitama Prefecture, Japan (越谷市千間台西越谷市)
5.2 km PM2.5: 5.5 µg/m³
50
Hanaguri, Sōka-shi, Saitama-ken, Japan (草加市花栗自排草加市)
5.6 km PM2.5: 12.0 µg/m³
9
Sasakubo, Saitama, Japan (さいたま市城南さいたま市岩槻区)
6.2 km PM2.5: 2.2 µg/m³
29
Mashito, Kasukabe-shi, Saitama-ken, Japan (春日部増戸自排春日部市)
9.0 km PM2.5: 7.0 µg/m³
29
Mashito, Kasukabe-shi, Saitama-ken, Japan (春日部増戸自排春日部市)
9.0 km PM2.5: 7.0 µg/m³
23
Noda, Noda-shi, Chiba-ken, Japan (野田市野田野田市)
9.4 km PM2.5: 5.5 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

What cities are near Koshigaya?

22 Matsubushi 20 Yoshikawa 17 Sōka 23 Hatogaya-honchō 5 Yashio 21 Toneri 17 Noda 16 Misato, Saitama 20 Takenotsuka 17 Nagareyama
Get AQI alerts for Koshigaya

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 2026-06-08T23:21 UTC.