Air Quality in Saku, Japan

Drizzle
19.2°C · 96.8% humidity
19.2°
Feels 19.2°
72
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast
34 5am
34
27
72 8am
59
48
42 11am
37
33
31 2pm
29
28
27 5pm
29
28
35 8pm
55
54
54 11pm
54
54
54 2am
54
54
AD 728×90

Air Quality Index Trend

46h · 2 stn

Saku'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 Saku is 1.5× the WHO 24-hour guideline of 15 µg/m³.

96.8%
Humidity
22.9 km/h
Wind ESE
1004.0 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
72
22.1 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Saku?

Temperature & Precipitation

PM2.5 Trend

46h · 2 stations
PM2.522.1 µg/m³ ×1.5 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (1 station within 25 km)
22.1
Median
22.1
Average
22.1
Low
22.1
High
PM2.5 µg/m³ · Model: 10.0 · Bias: -12.1
Both models agree Avg diff: 3.7°C

Where are air quality stations near Saku?

61
Atobe, Saku, Nagano, Japan (佐久佐久市)
2.4 km PM2.5: 16.9 µg/m³
10
倉敷市/庄, Japan (庄倉敷市)
20.7 km PM2.5: 2.4 µg/m³

What cities are near Saku?

61 Komoro 44 Miyota 61 Tōmi 44 Karuizawa 72 Kamimaruko 56 Ueda 44 Tomioka 51 Chino 42 Sakaki 49 Suwa
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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 2026-07-21T23:16 UTC.