Air Quality in Iiyama, Japan

Partly Cloudy
18.0°C · 53.0% humidity
18.0°
Feels 18.0°
23
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
25 11am
24
25
23 2pm
25
25
25 5pm
27
27
27 8pm
34
34
54 11pm
54
54
54 2am
54
54
54 5am
54
54
34 8am
27
25
AD 728×90

Air Quality Index Trend

47h · 7 stn

Iiyama'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.

53.0%
Humidity
12.1 km/h
Wind NW
1015.4 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
23
5.6 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Iiyama?

Temperature & Precipitation

PM2.5 Trend

47h · 7 stations
PM2.55.6 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX12.9
Extreme
AD 300×250

What is the 7-day forecast for Iiyama?

06-09
18.0° 12.8°
1.19 mm
06-10
15.9° 8.7°
15.56 mm
06-11
19.9° 10.9°
0.62 mm
06-12
14.1° 11.6°
1.44 mm
06-13
20.8° 12.5°
0.62 mm
06-14
22.8° 11.8°
0.69 mm
06-15
23.5° 14.2°
0.5 mm
Both models agree Avg diff: 3.2°C

Where are air quality stations near Iiyama?

5
Nagano (長野)
27.2 km PM2.5: 1.2 µg/m³
34
Nagano (長野)
27.2 km PM2.5: 8.2 µg/m³
53
Amori, Nagano, Nagano, Japan (環境保全研究所長野市)
29.4 km PM2.5: 13.1 µg/m³

What cities are near Iiyama?

37 Nakano 25 Arai 25 Myoko 33 Suzaka 40 Nagano 26 Jōetsu 21 Chikuma 25 Sakaki 41 Tōkamachi 41 Shiozawa
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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 2026-06-09T05:26 UTC.