Happo One 7-Day Snow Forecast

Happo One Long-Range Snow Forecast Updated today

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Updated 20 March 2026 16:40 GMT

Long-Range Snow Forecast for Happo One

Long-range (14 to 45 days) from 20 March.

For Forecast detail, see below.

Happo One Snow Forecast Highlights

When will there be fresh snow in Happo One?

Happo One Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (1,296m)
Next Snow Expected	20 March
Next Snow Amount	3cm 1in
Next 48 Hours	3cm 1in
Next 7 Days	5cm 2in

Long-range Snow Outlook for Happo One

Snowfall

Snow Line

Max 13℃ 55°F
Min -5℃ 24°F

8cm 3in New Snow

Snow Line from 1,606m 5,269ft to resort level ( 760m 2,493ft ).

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Happo One 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 Happo One from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Fri 20	up to 3cm up to 1in New Snow Light snow showers at altitude, light rain showers below. Snow Line from 991m 3,251ft to resort level ( 760m 2,493ft ).	Max 10℃ 50°F Min 0℃ 32°F
Sat 21	Clear sky.	Max 7℃ 44°F Min -5℃ 24°F
Sun 22	Clear spells.	Max 12℃ 54°F Min -3℃ 27°F
Mon 23	up to 3cm up to 1in New Snow Light snow at altitude, light drizzle below. Snow Line from 945m 3,100ft to 822m 2,697ft , with rain below.	Max 10℃ 51°F Min 1℃ 35°F
Tue 24	Clear spells.	Max 12℃ 53°F Min 0℃ 32°F
Wed 25	up to 2cm up to 1in New Snow Light snow at altitude, light drizzle below. Snow Line from 1,606m 5,269ft to 975m 3,199ft , with rain below.	Max 10℃ 50°F Min 3℃ 37°F
Thu 26	up to 1cm New Snow Light snow at altitude, light drizzle below. Snow Line from 1,575m 5,167ft to 1,114m 3,655ft , with rain below.	Max 13℃ 55°F Min 4℃ 39°F

This Snow Forecast for Happo One, 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 Happo One, 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.

Happo One Snow Forecast updated at 16:40 GMT, next update expected imminently.

Ensemble forecast for Happo One, Japan at 760m

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 Forecast near Happo One

Snow Forecasts for Ski Resorts near Happo One
Ski Area	48 Hr	7 Day
Hakuba 47	3cm 1in	6cm 2in
Tsugaike Kogen	3cm 1in	6cm 2in
Hakuba Norikura	2cm 1in	4cm 2in
Myoko Suginohara	1cm -	4cm 1in
Myoko Akakura / Shinakakura	1cm -	2cm 1in
Myoko Ikenotaira	1cm -	1cm -

Snow Reliability

Happo One typically enjoys reliable snow conditions, with an average snow depth of 3 to 4 meters during peak season. For the latest snow reports and updates, check J2Ski.

Off-Piste Safety in Happo One

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