Air Quality in Ōtsu, Japan

Partly Cloudy
19.8°C · 67.7% humidity
19.8°
Feels 19.8°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
20 stations

Nearby Monitoring Stations

AQI Forecast
54 6am
54
54
20 9am
15
18
20 12pm
21
24
25 3pm
26
26
26 6pm
27
34
54 9pm
54
54
66 12am
66
66
66 3am
66
54
AD 728×90

Air Quality Index Trend

48h · 55 stn

Ōtsu'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.

67.7%
Humidity
16.1 km/h
Wind ESE
1015.2 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
20
4.93 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Ōtsu?

Temperature & Precipitation

PM2.5 Trend

48h · 55 stations
PM2.54.93 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX10.9
Extreme
AD 300×250
Station readings (20 stations within 25 km)
4.93
Median
5.04
Average
2.2
Low
8.6
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +2.4

What is the 7-day forecast for Ōtsu?

06-09
25.6° 19.8°
1.0 mm
06-10
23.0° 15.7°
12.06 mm
06-11
28.7° 18.2°
06-12
22.9° 20.1°
0.06 mm
06-13
30.4° 19.2°
0.06 mm
06-14
26.8° 19.3°
1.31 mm
06-15
28.2° 17.9°
2.63 mm
Both models agree Avg diff: 1.9°C

Where are air quality stations near Ōtsu?

57
Otowadai, Otsu, Shiga, Japan (逢坂大津市)
0.3 km PM2.5: 15.0 µg/m³
9
Misasagishichonocho, Kyoto Prefecture, Japan (山科京都市山科区)
5.1 km PM2.5: 2.2 µg/m³
40
Nagitsuji Ikejiricho, Kyoto Prefecture, Japan (自排山科京都市山科区)
5.7 km PM2.5: 9.6 µg/m³
17
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 4.1 µg/m³
52
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 12.6 µg/m³
5
Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)
8.0 km PM2.5: 1.2 µg/m³
34
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 8.2 µg/m³
13
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 3.1 µg/m³
21
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 5.0 µg/m³
32
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 7.7 µg/m³

What cities are near Ōtsu?

13 Kusatsu 27 Kyoto 27 Kamigyō-ku 20 Rittō 34 Moriyama 19 Uji 29 Mukō 20 Kōtari 27 Arashiyama 25 Yasu
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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 2026-06-09T00:40 UTC.