Air Quality in Ōtsu, Japan

Heavy Rain
20.6°C · 76.4% humidity
20.6°
Feels 20.6°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
26 stations

Nearby Monitoring Stations

AQI Forecast
34 6am
34
34
36 9am
41
57
59 12pm
61
63
64 3pm
64
53
53 6pm
53
54
34 9pm
34
34
54 12am
54
54
54 3am
54
54
AD 728×90

Air Quality Index Trend

47h · 72 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. Current PM2.5 concentration in Ōtsu is 1.7× the WHO annual guideline of 5 µg/m³.

76.4%
Humidity
79.6 km/h
Wind SSE
999.6 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
36
8.64 µg/m³
PM10▲
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Ōtsu?

Temperature & Precipitation

PM2.5 Trend

47h · 72 stations
PM2.58.64 µg/m³ ✓ WHO
Good
PM1066.15 µg/m³
Moderate
UV INDEX10.9
Extreme
AD 300×250
Station readings (26 stations within 25 km)
8.64
Median
7.52
Average
4.1
Low
12.0
High
PM2.5 µg/m³ · Model: 16.35 · Bias: +7.7

What is the 7-day forecast for Ōtsu?

05-29
20.6° 17.8°
30.63 mm
05-30
24.1° 17.3°
1.13 mm
05-31
25.3° 19.2°
0.06 mm
06-01
28.9° 18.7°
06-02
25.8° 18.5°
0.06 mm
06-03
26.2° 17.3°
1.25 mm
06-04
27.2° 14.2°
0.31 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Ōtsu?

34
Otowadai, Otsu, Shiga, Japan (逢坂大津市)
0.3 km PM2.5: 8.2 µg/m³
25
Misasagishichonocho, Kyoto Prefecture, Japan (山科京都市山科区)
5.1 km PM2.5: 6.0 µg/m³
38
Nagitsuji Ikejiricho, Kyoto Prefecture, Japan (自排山科京都市山科区)
5.7 km PM2.5: 9.1 µg/m³
53
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 13.1 µg/m³
40
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 9.6 µg/m³
31
Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)
8.0 km PM2.5: 7.4 µg/m³
29
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 7.0 µg/m³
34
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 8.2 µg/m³
38
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 9.1 µg/m³
55
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 14.0 µg/m³

What cities are near Ōtsu?

22 Kusatsu 42 Kyoto 42 Kamigyō-ku 26 Rittō 25 Moriyama 32 Uji 37 Mukō 28 Kōtari 36 Arashiyama 27 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 2026-05-29T00:11 UTC.