Air Quality in Iiyama, Japan

Rain
18.1°C · 96.4% humidity
18.1°
Feels 18.1°
46
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
27 7am
27
27
46 10am
41
37
34 1pm
32
31
30 4pm
29
28
35 7pm
55
54
54 10pm
54
54
54 1am
54
54
54 4am
54
34
AD 728×90

Air Quality Index Trend

46h · 1 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.

96.4%
Humidity
30.7 km/h
Wind SSE
1004.0 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
46
10.97 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Iiyama?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station
PM2.510.97 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Both models agree Avg diff: 4.4°C

Where are air quality stations near Iiyama?

65
Nagano (長野)
27.2 km PM2.5: 18.8 µg/m³
76
Nagano (長野)
27.2 km PM2.5: 24.0 µg/m³
25
Amori, Nagano, Nagano, Japan (環境保全研究所長野市)
29.4 km PM2.5: 6.0 µg/m³

What cities are near Iiyama?

74 Nakano 30 Arai 30 Myoko 69 Suzaka 74 Nagano 31 Jōetsu 71 Chikuma 70 Sakaki 31 Tōkamachi 27 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 2026-07-22T01:20 UTC.