Air Quality in Katsuyama, Japan
Partly Cloudy
30.1°C · 66.7% humidity
30.1°
Feels 35.5°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Katsuyama's air quality — share it
AQI Forecast
27
7am
27
27
68
10am
56
48
42
1pm
38
35
33
4pm
31
30
29
7pm
35
35
55
10pm
55
34
34
1am
34
34
34
4am
27
27
Air Quality Index Trend
37h · 4 stnKatsuyama'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 Katsuyama is 1.3× the WHO 24-hour guideline of 15 µg/m³.
66.7%
Humidity
15.3 km/h
Wind S
998.5 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
20.2 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Katsuyama?
Temperature & Precipitation
PM2.5 Trend
37h · 4 stationsPM2.520.2 µg/m³
×1.3 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
Station readings (1 station within 25 km)
20.2
Median
20.2
Average
20.2
Low
20.2
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -13.7
What is the 7-day forecast for Katsuyama?
07-22
33.0° 20.7°
1.37 mm
07-23
27.1° 15.5°
6.94 mm
07-24
25.1° 23.8°
10.19 mm
07-25
28.7° 19.6°
13.25 mm
07-26
28.8° 19.3°
0.13 mm
07-27
27.5° 20.6°
5.63 mm
07-28
25.8° 20.7°
7.37 mm
Both models agree
Avg diff: 2.4°C
Where are air quality stations near Katsuyama?
17
Mizuotoshicho, Ono, Fukui, Japan (大野大野市)
50
Toyoshima, Fukui, Fukui, Japan (福井福井市)
22
Sadatomocho, Echizen, Fukui, Japan (今立越前市)
What cities are near Katsuyama?
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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 2026-07-22T01:24 UTC.