What is the air quality in Saku today?

The current Air Quality Index (AQI) in Saku is 17 (Good). PM2.5 concentration is 4.1 µg/m³.

What is the temperature in Saku right now?

The current temperature in Saku is 12.1°C (feels like 12.1°C). Humidity is 76.9% and wind speed is 39.9 km/h.

Is it safe to go outside in Saku?

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

Air Quality in Saku, Japan

Drizzle

12.1°C · 76.9% humidity

12.1°

Feels 12.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 6 stn

View full history →

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.

76.9%

Humidity

39.9 km/h

Wind E

1020.5 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.1 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Saku?

Temperature & Precipitation

PM2.5 Trend

45h · 6 stations

PM2.54.1 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

4.1

Median

4.1

Average

4.1

Low

4.1

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +1.7

What is the 7-day forecast for Saku?

10-21

13.3° 8.4°

0.19 mm

10-22

17.0° 11.9°

0.75 mm

10-23

16.2° 6.2°

10-24

14.8° 10.9°

0.19 mm

10-25

13.8° 4.4°

2.75 mm

10-26

14.8° 3.9°

10-27

11.6° 6.2°

0.06 mm

Both models agree Avg diff: 4.9°C

Where are air quality stations near Saku?

Atobe, Saku, Nagano, Japan (佐久佐久市)

2.4 km PM2.5: 4.1 µg/m³

127

甲府市/甲府市役所自排, Japan (甲府市役所自排甲府市)

20.7 km PM2.5: 46.1 µg/m³

What cities are near Saku?

21 Komoro 24 Miyota 25 Tōmi 27 Karuizawa 17 Kamimaruko 36 Ueda 16 Tomioka 50 Chino 41 Sakaki 50 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 2026-10-21T05:27 UTC.