Air Quality in Karuizawa, Japan
Clear
16.9°C · 49.6% humidity
16.9°
Feels 16.9°
9
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Karuizawa's air quality — share it
AQI Forecast
24
7am
24
24
9
10am
13
16
18
1pm
20
21
22
4pm
23
24
24
7pm
26
27
27
10pm
34
54
54
1am
54
54
54
4am
54
54
Air Quality Index Trend
46h · 9 stnKaruizawa'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.
49.6%
Humidity
2.7 km/h
Wind W
1015.4 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
2.2 µg/m³
PM10▲
13.7 µg/m³
050100150200300500
What is the weather forecast for Karuizawa?
Temperature & Precipitation
PM2.5 Trend
46h · 9 stationsPM2.52.2 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX12.9
Extreme
Station readings (1 station within 25 km)
2.2
Median
2.2
Average
2.2
Low
2.2
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +4.0
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?
25
Atobe, Saku, Nagano, Japan (佐久佐久市)
21
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
5
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
13
Ozasa, Gunma, Japan (嬬恋村運動公園吾妻郡嬬恋村)
38
Haramachi, Gunma Prefecture, Japan (東吾妻町立東吾妻中学校吾妻郡東吾妻町)
18
Haramachi, Gunma Prefecture, Japan (東吾妻町立東吾妻中学校吾妻郡東吾妻町)
What cities are near Karuizawa?
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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 2026-06-09T01:04 UTC.