Air Quality in Jōetsu, Japan
Drizzle
24.9°C · 85.8% humidity
24.9°
Feels 24.9°
65
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Jōetsu's air quality — share it
AQI Forecast
25
5am
25
27
65
8am
54
54
48
11am
44
41
39
2pm
38
37
36
5pm
35
55
55
8pm
54
54
54
11pm
54
54
54
2am
54
54
Air Quality Index Trend
32h · 1 stnJōetsu'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. Current PM2.5 concentration in Jōetsu is 1.3× the WHO 24-hour guideline of 15 µg/m³.
85.8%
Humidity
64.5 km/h
Wind E
999.0 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
18.8 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Jōetsu?
Temperature & Precipitation
PM2.5 Trend
32h · 1 stationPM2.518.8 µg/m³
×1.3 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
Station readings (1 station within 25 km)
18.8
Median
18.8
Average
18.8
Low
18.8
High
PM2.5 µg/m³ · Model: 10.0 · Bias: -8.8
What is the 7-day forecast for Jōetsu?
07-21
24.6° 22.7°
3.94 mm
07-22
26.4° 23.4°
2.12 mm
07-23
25.2° 21.1°
1.06 mm
07-24
26.1° 23.0°
0.13 mm
07-25
26.7° 23.3°
2.81 mm
07-26
26.2° 23.9°
07-27
26.8° 24.0°
0.81 mm
Both models agree
Avg diff: 2.1°C
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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 2026-07-21T23:15 UTC.