Air Quality in Karuizawa, Japan

Clear
19.2°C · 49.3% humidity
19.2°
Feels 19.2°
6
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
24 9am
24
24
6 12pm
11
15
17 3pm
19
21
23 6pm
23
26
26 9pm
26
34
54 12am
54
54
54 3am
54
54
54 6am
54
54
AD 728×90

Air Quality Index Trend

46h · 6 stn

Karuizawa'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.

49.3%
Humidity
18.1 km/h
Wind SE
1014.6 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
6
1.4 µg/m³
PM10▲
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Karuizawa?

Temperature & Precipitation

PM2.5 Trend

46h · 6 stations
PM2.51.4 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
1.4
Median
1.4
Average
1.4
Low
1.4
High
PM2.5 µg/m³ · Model: 5.9 · Bias: +4.5

What is the 7-day forecast for Karuizawa?

06-09
19.2° 12.7°
1.94 mm
06-10
18.5° 10.1°
30.88 mm
06-11
20.0° 10.9°
1.5 mm
06-12
17.8° 13.2°
1.0 mm
06-13
23.5° 12.3°
0.38 mm
06-14
22.4° 11.6°
2.69 mm
06-15
22.1° 14.6°
0.44 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Karuizawa?

34
Atobe, Saku, Nagano, Japan (佐久佐久市)
20.4 km PM2.5: 8.2 µg/m³
23
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
20.4 km PM2.5: 5.5 µg/m³
30
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
20.4 km PM2.5: 7.2 µg/m³
13
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
20.4 km PM2.5: 3.1 µg/m³
21
Haramachi, Gunma Prefecture, Japan (東吾妻町立東吾妻中学校吾妻郡東吾妻町)
29.9 km PM2.5: 5.0 µg/m³
18
Haramachi, Gunma Prefecture, Japan (東吾妻町立東吾妻中学校吾妻郡東吾妻町)
29.9 km PM2.5: 4.3 µg/m³

What cities are near Karuizawa?

6 Miyota 10 Komoro 6 Saku 20 Annaka 14 Tōmi 25 Tomioka 26 Ueda 29 Nakanojō 20 Kamimaruko 29 Kanekomachi
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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 2026-06-09T03:06 UTC.