What is the air quality in Ōtsu today?

The current Air Quality Index (AQI) in Ōtsu is 10 (Good). PM2.5 concentration is 2.45 µg/m³.

What is the temperature in Ōtsu right now?

The current temperature in Ōtsu is 19.1°C (feels like 19.1°C). Humidity is 78.1% and wind speed is 27.7 km/h.

Is it safe to go outside in Ōtsu?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Ōtsu, Japan

Drizzle

19.1°C · 78.1% humidity

19.1°

Feels 19.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

19 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 56 stn

View full history →

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.

78.1%

Humidity

27.7 km/h

Wind ENE

1018.6 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

2.45 µg/m³

PM10▲

13.7 µg/m³

050100150200300500

What is the weather forecast for Ōtsu?

Temperature & Precipitation

PM2.5 Trend

45h · 56 stations

PM2.52.45 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (19 stations within 25 km)

2.45

Median

9.03

Average

2.4

Low

13.1

High

PM2.5 µg/m³ · Model: 6.5 · Bias: +4.1

What is the 7-day forecast for Ōtsu?

10-21

19.1° 15.5°

1.0 mm

10-22

24.2° 16.7°

0.19 mm

10-23

20.7° 14.4°

0.06 mm

10-24

22.8° 16.9°

0.38 mm

10-25

21.9° 11.1°

6.31 mm

10-26

19.4° 11.6°

10-27

18.5° 12.3°

Both models agree Avg diff: 3.6°C

Where are air quality stations near Ōtsu?

Otowadai, Otsu, Shiga, Japan (逢坂大津市)

0.3 km PM2.5: 4.1 µg/m³

Otowadai, Otsu, Shiga, Japan (逢坂大津市)

0.3 km PM2.5: 2.4 µg/m³

Nagitsuji Ikejiricho, Kyoto Prefecture, Japan (自排山科京都市山科区)

5.7 km PM2.5: 2.4 µg/m³

Nagitsuji Ikejiricho, Kyoto Prefecture, Japan (自排山科京都市山科区)

5.7 km PM2.5: 5.0 µg/m³

Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)

8.0 km PM2.5: 8.2 µg/m³

Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)

8.0 km PM2.5: 10.1 µg/m³

Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)

8.0 km PM2.5: 10.1 µg/m³

Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)

8.7 km PM2.5: 2.6 µg/m³

Kyoto (京都)

9.1 km PM2.5: 12.0 µg/m³

Nishikiomiyacho, Kyoto Prefecture, Japan (自排大宮京都市中京区)

10.8 km PM2.5: 12.0 µg/m³

What cities are near Ōtsu?

16 Kusatsu 48 Kyoto 48 Kamigyō-ku 30 Rittō 50 Moriyama 53 Uji 35 Mukō 40 Kōtari 42 Arashiyama 35 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 2026-10-21T05:26 UTC.