Air Quality in Hiji, Japan

Drizzle
25.6°C · 98.3% humidity
25.6°
Feels 25.6°
79
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
5 stations

Nearby Monitoring Stations

AQI Forecast
54 7am
34
27
79 10am
66
50
44 1pm
46
42
40 4pm
58
57
56 7pm
56
55
84 10pm
84
83
83 1am
83
83
66 4am
66
66
AD 728×90

Air Quality Index Trend

45h · 13 stn

Hiji'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 Hiji is 1.7× the WHO 24-hour guideline of 15 µg/m³.

98.3%
Humidity
67.5 km/h
Wind ESE
992.6 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
79
25.22 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Hiji?

Temperature & Precipitation

PM2.5 Trend

45h · 13 stations
PM2.525.22 µg/m³ ×1.7 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (5 stations within 25 km)
25.22
Median
23.14
Average
12.6
Low
31.1
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -14.4

What is the 7-day forecast for Hiji?

07-22
28.7° 23.4°
7.75 mm
07-23
28.5° 18.8°
7.0 mm
07-24
29.3° 24.4°
0.75 mm
07-25
30.8° 21.5°
07-26
31.9° 22.7°
2.63 mm
07-27
30.3° 22.5°
07-28
29.5° 23.8°
1.44 mm
Both models agree Avg diff: 2.1°C

Where are air quality stations near Hiji?

69
Noguchihara, Beppu, Oita Prefecture, Japan (青山中学校別府市)
10.2 km PM2.5: 20.7 µg/m³
38
Oita (大分)
16.3 km PM2.5: 9.1 µg/m³
26
Yokose, Oita, Oita Prefecture, Japan (西部清掃事業所大分市)
20.5 km PM2.5: 6.2 µg/m³
35
Yokose, Oita, Oita Prefecture, Japan (西部清掃事業所大分市)
20.5 km PM2.5: 8.4 µg/m³
23
Yokota, Oita, Oita Prefecture, Japan (大在小学校大分市)
22.2 km PM2.5: 5.5 µg/m³
4
Shōnaichō Kakiharu, Yufu-shi, Ōita-ken, Japan (中部保健所由布保健部由布市)
23.4 km PM2.5: 1.0 µg/m³
43
Nakahetsugi, Oita, Oita Prefecture, Japan (戸次中学校大分市)
27.5 km PM2.5: 10.3 µg/m³
54
Kunisakimachi Tsurugawa, Kunisaki-shi, Ōita-ken, Japan (国東高等学校国東市)
28.0 km PM2.5: 13.5 µg/m³

What cities are near Hiji?

71 Kitsuki 85 Beppu 70 Ōita 75 Tsurusaki 61 Bungo-Takada-shi 59 Yufu 59 Yokkaichi 56 Kunisaki 31 Tsukawaki 77 Usuki
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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 2026-07-22T01:18 UTC.