Air Quality in Saku, Japan

Drizzle
15.7°C · 79.6% humidity
15.7°
Feels 15.7°
44
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
25 4am
25
25
44 7am
39
34
31 10am
29
29
30 1pm
56
55
55 4pm
55
34
34 7pm
27
27
25 10pm
25
27
27 1am
27
27
AD 728×90

Air Quality Index Trend

46h · 5 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 2.1× the WHO annual guideline of 5 µg/m³.

79.6%
Humidity
33.2 km/h
Wind ESE
999.1 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
44
10.6 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Saku?

Temperature & Precipitation

PM2.5 Trend

46h · 5 stations
PM2.510.6 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (1 station within 25 km)
10.6
Median
10.6
Average
10.6
Low
10.6
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -3.5

What is the 7-day forecast for Saku?

05-28
23.2° 9.6°
0.56 mm
05-29
17.3° 13.4°
23.5 mm
05-30
17.1° 11.6°
0.69 mm
05-31
19.8° 13.1°
0.19 mm
06-01
22.2° 13.8°
0.13 mm
06-02
21.1° 11.4°
2.12 mm
06-03
21.9° 14.5°
3.5 mm
Both models agree Avg diff: 3.4°C

Where are air quality stations near Saku?

89
Atobe, Saku, Nagano, Japan (佐久佐久市)
2.4 km PM2.5: 30.2 µg/m³
12
倉敷市/庄, Japan (庄倉敷市)
20.7 km PM2.5: 2.9 µg/m³

What cities are near Saku?

32 Komoro 17 Miyota 32 Tōmi 17 Karuizawa 44 Kamimaruko 32 Ueda 27 Tomioka 44 Chino 28 Sakaki 44 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 2026-05-28T22:51 UTC.