Air Quality in Nagano, Japan

Drizzle
14.9°C · 96.4% humidity
14.9°
Feels 14.9°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
27 2am
27
25
21 5am
25
25
25 8am
25
25
25 11am
25
25
25 2pm
25
25
25 5pm
27
27
34 8pm
34
27
27 11pm
27
27
AD 728×90

Air Quality Index Trend

43h · 2 stn

Nagano'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
18.3 km/h
Wind SW
1020.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
21
5.0 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

43h · 2 stations
PM2.55.0 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
5.0
Median
5.0
Average
5.0
Low
5.0
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +4.8
05-29
21.3° 14.9°
40.06 mm
05-30
22.8° 13.3°
2.63 mm
05-31
24.8° 14.7°
0.06 mm
06-01
22.7° 15.7°
0.31 mm
06-02
23.2° 13.5°
0.31 mm
06-03
26.1° 16.6°
4.19 mm
06-04
21.0° 11.3°
1.31 mm
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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 2026-05-29T20:42 UTC.