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Karuizawa Weather Forecast - 7 to 16 days - 12th August 2026

Karuizawa Weather

ECMWF IFS
GFS
JMA

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Weather Forecast for Karuizawa (3,084ft to 3,789ft)

Weather Outlook from 12 August.

Karuizawa Forecast

See below for the detailed long-range forecast, including lowest and highest temperatures, sunshine, cloud cover, wind and rain projections.

Karuizawa Weather Forecast updated at 20:44 PDT, next update expected 23:00 PDT.

Long-range Snow Outlook for Karuizawa

 
Snowfall

 
Snow Line

Max 81°F
Min 58°F

Snow unlikely

Karuizawa Daily Weather Forecast Detail

16 Day Weather and Snow Forecast for Karuizawa from OpenMeteo(JMA)
BaseSnow and WeatherTemp
Town
Wed
12
Drizzle

Drizzle.

Max 65°F
Min 63°F
Thu
13
Lt Rain

Light rain.

Max 70°F
Min 65°F
Fri
14
Lt Rain

Light rain.

Max 69°F
Min 66°F
Sat
15
Lt Drizzle

Light drizzle.

Max 71°F
Min 61°F
Sun
16
Cloud

Cloudy.

Max 77°F
Min 58°F
Mon
17
Mixed

Clear spells.

Max 81°F
Min 62°F
Tue
18
Mixed

Clear spells.

Max 81°F
Min 64°F

No significant snowfall is forecast for this period.

This Snow Forecast for Karuizawa, Japan gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Karuizawa, on any given trail or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Karuizawa Weather Forecast updated at 20:44 PDT, next update expected 23:00 PDT.

Current Snow

For current snow depths and skiing conditions, see our Current Snow Report for Karuizawa.

For more information about this Japanese Ski Resort, See Also Skiing and Snowboarding in Karuizawa .

Off-Piste Safety in Karuizawa

Before skiing or snowboarding off-piste in Karuizawa, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.