Ajigasawa 7-Day Snow Forecast

Ajigasawa Long-Range Snow Forecast Updated today

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Updated 11 September 2026 15:42 NZST

Long-Range Snow Forecast for Ajigasawa

Long-range (14 to 45 days) from 11 September.

For Forecast detail, see below.

Ajigasawa Snow Forecast Highlights

When will there be fresh snow in Ajigasawa?

Ajigasawa Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (659m)
Next Snow?
There is no snow currently in the forecast for Ajigasawa.

Long-range Snow Outlook for Ajigasawa

Snowfall

Snow Line

Max 25℃
Min 13℃

Snow unlikely

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Ajigasawa 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 Ajigasawa from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Fri 11	Fair.	Max 19℃ Min 14℃
Sat 12	Clear sky.	Max 21℃ Min 14℃
Sun 13	Fair.	Max 25℃ Min 13℃
Mon 14	Fair.	Max 21℃ Min 19℃
Tue 15	Rain showers.	Max 20℃ Min 18℃
Wed 16	Fair.	Max 21℃ Min 18℃
Thu 17	Clear spells.	Max 21℃ Min 15℃

No significant snowfall is forecast for this period.

This Snow Forecast for Ajigasawa, 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 Ajigasawa, 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.

Ajigasawa Snow Forecast updated at 15:42 NZST, next update expected 21:00 NZST.

Ensemble forecast for Ajigasawa, Japan at 396m

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

Ajigasawa typically enjoys reliable snow conditions, with average snow depths of around 3 to 4 meters throughout the season. For the latest snow conditions, check J2Ski for up-to-date information.

Off-Piste Safety in Ajigasawa

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