Happo One Snow Report and Forecast
Snow Forecast for Happo One
When will there be fresh snow?
This is the Snow Forecast for Happo One, Japan for 16 days from 28 May.
Updated 28 May 2025 13:30 BST.
| Next Snow? | |
|---|---|
| There is no snow currently in the forecast for Happo One. | |
| Free Snow Reports by e-Mail | Sign Up for Powder Alerts |
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Happo One.
Forecast for today in Happo One
Max 15℃ 59°F
Min 8℃ 47°F
Valley temperatures from an overnight low of 8℃ 47°F to daytime highs around 15℃ 59°F
Temperature at BaseTemp at Base
Wed
28
Snow unlikely
Clear spells, light rain showers, fair later.
Happo One has no new snow forecast in the next 48 hours.
Happo One Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Happo One 7-Day Snow Forecast Overview
Get this snow forecast by e-mail Join J2Ski's Snow Mail Here
NEW FOR 24/25 - Improved Forecasts for Happo One - high-resolution weather models, updated more often - Subscribe
| Wed 28 | Thu 29 | Fri 30 | Sat 31 | Sun 01 | Mon 02 | Tue 03 | |
|---|---|---|---|---|---|---|---|
| Wind | W F3 | ||||||
| 1,831m 6,007ft | 15℃ 59°F
| 16℃ 61°F
| 11℃ 52°F
 | 12℃ 54°F
| 11℃ 53°F
 | 17℃ 62°F
| 14℃ 58°F
 |
| W F2 | SE F2 | ||||||
| 1,296m 4,250ft | 15℃ 59°F
| 16℃ 61°F
| 11℃ 52°F
| 12℃ 54°F
| 13℃ 56°F
| 19℃ 66°F
| 15℃ 58°F
|
| 760m 2,493ft | 15℃ 59°F
| 16℃ 61°F
| 11℃ 52°F
| 16℃ 60°F
| 18℃ 64°F
| 23℃ 74°F
| 17℃ 63°F
|
| Snow Line | |||||||
| Max Town | 15℃ 59°F | 16℃ 61°F | 11℃ 52°F | 16℃ 60°F | 18℃ 64°F | 23℃ 74°F | 17℃ 63°F |
| Min Town | 8℃ 47°F | 7℃ 45°F | 7℃ 45°F | 11℃ 52°F | 8℃ 47°F | 12℃ 54°F | 15℃ 59°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.
Happo One Medium-Range (7-Day) Snow Forecast Detail
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.
Max 15℃ 59°F
Min 8℃ 47°F
Valley temperatures from an overnight low of 8℃ 47°F to daytime highs around 15℃ 59°F
Temperature at BaseTemp at Base
Wed
28
Snow unlikely
Clear spells, light rain showers, fair later.
Max 16℃ 61°F
Min 7℃ 45°F
Valley temperatures from an overnight low of 7℃ 45°F to daytime highs around 16℃ 61°F
Temperature at BaseTemp at Base
Thu
29
Snow unlikely
Clear spells, cloudy, rain later.
Max 11℃ 52°F
Min 7℃ 45°F
Valley temperatures from an overnight low of 7℃ 45°F to daytime highs around 11℃ 52°F
Temperature at BaseTemp at Base
Fri
30
Snow unlikely
Rain showers early, then cloudy later.
Max 16℃ 60°F
Min 11℃ 52°F
Valley temperatures from an overnight low of 11℃ 52°F to daytime highs around 16℃ 60°F
Temperature at BaseTemp at Base
Sat
31
Snow unlikely
Rain showers first, thunderstorms then light rain showers, fog later.
Max 18℃ 64°F
Min 8℃ 47°F
Valley temperatures from an overnight low of 8℃ 47°F to daytime highs around 18℃ 64°F
Temperature at BaseTemp at Base
Sun
01
Snow unlikely
Cloudy, fair, fog later.
Max 23℃ 74°F
Min 12℃ 54°F
Valley temperatures from an overnight low of 12℃ 54°F to daytime highs around 23℃ 74°F
Temperature at BaseTemp at Base
Mon
02
Snow unlikely
Cloudy, fog, cloudy later.
Max 17℃ 63°F
Min 15℃ 59°F
Valley temperatures from an overnight low of 15℃ 59°F to daytime highs around 17℃ 63°F
Temperature at BaseTemp at Base
Tue
03
Snow unlikely
Light rain early, then cloudy later.
No significant snowfall is forecast for this period.
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 13:30 BST, next update expected 16:00 BST.
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.