Ipponsugi 7-Day Snow Forecast

Ipponsugi Long-Range Snow Forecast Updated today

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Updated 12 June 2026 15:41 NZST

Long-Range Snow Forecast for Ipponsugi

Long-range (14 to 45 days) from 12 June.

For Forecast detail, see below.

Ipponsugi Snow Forecast Highlights

When will there be fresh snow in Ipponsugi?

Ipponsugi Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (455m)
Next Snow?
There is no snow currently in the forecast for Ipponsugi.

Long-range Snow Outlook for Ipponsugi

Snowfall

Snow Line

Max 27℃
Min 12℃

Snow unlikely

Ipponsugi Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Ipponsugi from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Fri 12	Light drizzle.	Max 22℃ Min 15℃
Sat 13	Clear sky.	Max 24℃ Min 14℃
Sun 14	Clear spells.	Max 27℃ Min 17℃
Mon 15	Light drizzle.	Max 22℃ Min 13℃
Tue 16	Clear sky.	Max 24℃ Min 13℃
Wed 17	Clear spells.	Max 26℃ Min 12℃
Thu 18	Clear spells.	Max 26℃ Min 14℃

No significant snowfall is forecast for this period.

This Snow Forecast for Ipponsugi, 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 Ipponsugi, on any given piste 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.

Ipponsugi Snow Forecast updated at 15:41 NZST, next update expected 21:00 NZST.

Ensemble forecast for Ipponsugi, Japan at 440m

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Reliability

Ipponsugi typically enjoys reliable snow conditions, with an average snow depth of 150 centimeters. Regular snowfall throughout the season ensures great skiing, but always check J2Ski for the latest snow conditions.

Off-Piste Safety in Ipponsugi

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