Air Quality in Ōtsu, Japan

Overcast
24.8°C · 94.6% humidity
24.8°
Feels 24.8°
65
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
19 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
8 7am
8
8
65 10am
49
37
29 1pm
23
19
16 4pm
14
12
11 7pm
10
9
9 10pm
9
9
8 1am
8
8
8 4am
8
8
Station readings
8
AD 728×90

Air Quality Index Trend

47h · 28 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 1.3× the WHO 24-hour guideline of 15 µg/m³.

94.6%
Humidity
25.2 km/h
Wind E
999.2 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
65
18.83 µg/m³
PM10
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Ōtsu?

Temperature & Precipitation

PM2.5 Trend

47h · 28 stations
PM2.518.83 µg/m³ ×1.3 WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (19 stations within 25 km)
18.83
Median
20.58
Average
9.6
Low
31.1
High
PM2.5 µg/m³ · Model: 16.35 · Bias: -2.5

What is the 7-day forecast for Ōtsu?

07-22
28.6° 24.3°
0.81 mm
07-23
28.7° 20.9°
5.25 mm
07-24
28.7° 26.3°
2.56 mm
07-25
33.7° 22.5°
4.13 mm
07-26
30.1° 24.1°
5.12 mm
07-27
33.1° 24.3°
07-28
29.3° 25.1°
1.0 mm
Both models agree Avg diff: 2.5°C

Where are air quality stations near Ōtsu?

27
Otowadai, Otsu, Shiga, Japan (逢坂大津市)
0.3 km PM2.5: 6.5 µg/m³
27
Misasagishichonocho, Kyoto Prefecture, Japan (山科京都市山科区)
5.1 km PM2.5: 6.5 µg/m³
23
Nagitsuji Ikejiricho, Kyoto Prefecture, Japan (自排山科京都市山科区)
5.7 km PM2.5: 5.5 µg/m³
17
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 4.1 µg/m³
46
Ishiyamadera, Otsu, Shiga, Japan (石山大津市)
6.2 km PM2.5: 11.0 µg/m³
65
Kusatsucho, Kusatsu, Shiga, Japan (草津草津市)
8.0 km PM2.5: 18.8 µg/m³
63
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 17.8 µg/m³
74
Daigokagiocho, Kyoto Prefecture, Japan (醍醐京都市伏見区)
8.1 km PM2.5: 23.0 µg/m³
17
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 4.1 µg/m³
25
Kusatsu, Kusatsu, Shiga, Japan (自排草津草津市)
8.7 km PM2.5: 6.0 µg/m³

What cities are near Ōtsu?

70 Kusatsu 77 Kyoto 76 Kamigyō-ku 72 Rittō 76 Moriyama 47 Uji 85 Mukō 66 Kōtari 76 Arashiyama 79 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 2026-07-22T01:12 UTC.