Happo One Snow Report and Forecast
Snow Forecast for Happo One
This is the Snow Forecast for Happo One, Japan for 17 days from 8 December.
Updated 08 December 2025 04:31 PST.
Forecast times for Happo One are in Japan Time (Asia/Tokyo).
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Happo One.
There is a useful amount of snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
Happo One Snow Forecast Highlights
When will there be fresh snow in Happo One?
| Next Snow Expected | 11 December |
|---|---|
| Next Snow Amount | 1in |
| Next 48 Hours | 1in |
| Next 7 Days | 5in |
Forecast for today in Happo One
Max 40°F
Min 29°F
Freeze-thaw conditions, with valley temperatures cooling to 29°F and rising to 40°F
Temperature at BaseTemp at Base
Snowfall
Snow Line
Mon
08
New Snow
Rain showers, rain, clear spells later.
Snow Line from 4,163ft to 3,474ft, with rain below.
Happo One has 1in new snow forecast in the next 48 hours.
Happo One Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
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| Mon 08 | Tue 09 | Wed 10 | Thu 11 | Fri 12 | Sat 13 | Sun 14 | |
|---|---|---|---|---|---|---|---|
| Wind | W F2 | W F2 | W F3 | SW F4 | |||
| 6,007ft | 40°F
 | 28°F
 | 35°F
| 41°F
+5in
| 22°F
 +5in
| 35°F
 | 40°F
+2in
|
| W F2 | SW F2 | W F2 | SW F3 | ||||
| 4,250ft | 40°F
| 28°F
| 35°F
| 42°F
 +1in
| 32°F
+3in
| 42°F
| 51°F
|
| W F2 | NW F2 | ||||||
| 2,493ft | 40°F
 | 28°F
| 35°F
| 43°F
| 33°F
| 31°F
| 41°F
|
| Snow Line | varying 4,163ft | varying 3,310ft | varying 3,376ft | varying 4,262ft | varying 3,343ft | varying 5,541ft | |
| Max Town | 40°F | 28°F | 35°F | 43°F | 33°F | 31°F | 41°F |
| Min Town | 29°F | 25°F | 27°F | 29°F | 20°F | 20°F | 29°F |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
Snow Forecast near Happo One
| Ski Area | 48 Hr | 7 Day | Mo | Tu | We | Th | Fr | Sa | Su |
|---|---|---|---|---|---|---|---|---|---|
| Hakuba 47 | - | 18in | |||||||
| Tsugaike Kogen | 1in | 18in | |||||||
| Myoko Suginohara | - | 15in | |||||||
| Myoko Akakura / Shinakakura | - | 14in | |||||||
| Myoko Ikenotaira | - | 12in | |||||||
| Hakuba Norikura | 1in | 5in | |||||||
| Myoko Pine Valley | - | 1in |
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.
Understanding and predicting Snow Conditions in Happo One
Here are our tips for making the most of a trip to Happo One, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Happo One, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Happo One is uncontrolled and un-marked slopes are not made safe (from avalanche risk) or patrolled. Always check local advice, know the Avalanche Risk Level, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Happo One will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Happo One for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.