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Japan Weekly Snow Roundup #293
Weekly Snow News for Japan, updated 17 December 2025: Siberian cold fuels relentless powder storms, with Hokkaido leading Japan’s mid-winter surge.
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Boreal Mountain at 2378 m altitude
Issued by Snow-Forecast.com at: 3 am (local time) / 18 Dec 2025
Now
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  | | |  | |  | |  |  | | | | |
some clouds | some clouds | some clouds | snow shwrs | mod. snow | light snow | light snow | light snow | light snow | heavy rain | mod. snow | heavy snow | mod. snow | heavy snow | snow shwrs | snow shwrs | snow shwrs | heavy snow | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | 3 | 8 | 2 | 3 | 2 | 2 | — | 9 | 14 | 8 | 18 | 12 | — | 1 | 30 | |
— | — | — | — | — | — | — | — | 24 | 27 | 24 | — | — | — | — | — | — | — | |
max °C | 6 | 4 | 4 | 3 | 2 | 2 | 1 | 1 | 3 | 3 | 2 | 1 | 0 | 2 | 0 | 0 | 0 | -1 |
min °C | 6 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 2 | 0 | 0 | 1 | -1 | -1 | 0 | -2 |
1 | -4 | -4 | -7 | -6 | -5 | -5 | -4 | -4 | -4 | -5 | -7 | -5 | -7 | -10 | -11 | -9 | -10 | |
56 | 39 | 44 | 77 | 98 | 88 | 96 | 97 | 99 | 98 | 99 | 99 | 98 | 99 | 96 | 73 | 85 | 98 | |
3350 | 3150 | 3300 | 3000 | 2750 | 2700 | 2600 | 2550 | 2950 | 2950 | 2800 | 2450 | 2350 | 2700 | 2300 | 2450 | 2300 | 2200 | |
 | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — |
 | — | 4:39 | — | — | 4:39 | — | — | 4:39 | — | — | 4:40 | — | — | 4:40 | — | — | 4:42 | — |
Next 0-3 days weather summary:
A heavy fall of snow, heaviest during Fri afternoon. Becoming milder with heavy rain (total 24.0mm) on Sat night. Mild temperatures (max 6°C on Thu morning, min 1°C on Fri morning). Winds decreasing (near gales from the WSW on Thu night, light winds from the WSW by Sat afternoon).
Next 4-6 days weather summary:
Heavy rain (total 51.0mm) on Sun afternoon. Becoming colder with heavy fall of snow, heaviest during Tue night. Freeze-thaw conditions (max 3°C on Sun morning, min -2°C on Tue night). Winds increasing (moderate winds from the WSW on Mon morning, severe gales from the S by Tue afternoon).
Popular Boreal Mountain Pages
Snow Radar
Latest snow reports near Boreal Mountain:
Boreal Mountain Snow Conditions
| Top snow depth: | 43 cm |
|---|---|
| Bottom snow depth: | 43 cm |
| Fresh snowfall depth: | — |
| Last snowfall: | 20 Nov 2025 |
| Snow Alerts | Create Alert |
Other resorts in USA - California are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.4 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
1.4 | Powder days Fresh snow, limited sun, any wind. |
0.8 | Bluebird days Average snow, mostly sunny, light wind. |
Boreal Mountain Forecast Snowfall
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Other resorts in USA - California are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Boreal Mountain at the specific elevation of 2378 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Boreal Mountain. To access the weather forecasts for the other elevations, use the tab navigation above the table. For a wider view of the weather, check out the Weather Map of United States.
Click here to read further information on freezing levels and how we forecast our temperatures.
Visitor Reviews of Boreal Mountain
Overall 3.4 Based on 2 votes and 4 reviews
- Snowsure
- Variety of pistes
- Vote
- peacockdreams from Australia writes:
Boreal is awesome! I travel there every winter from Australia to spend 3 months riding Boreal. It has the best terrain parks around the lake and is always one of the first mountains to open at the start of the season and one of the last to close! The passes are cheap and the night riding is off the hook! With the addition of a Big Air Bag this season, Boreal is park riders dream come true!
Visitor Reviews of Boreal Mountain
peacockdreams from Australia writes:
Boreal is awesome! I travel there every winter from Australia to spend 3 months riding Boreal. It has the best terrain parks around the lake and is always one of the first mountains to open at the start of the season and one of the last to close! The passes are cheap and the night riding is off the hook! With the addition of a Big Air Bag this season, Boreal is park riders dream come true!
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