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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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Deer Mountain at 1830 m altitude
Issued by Snow-Forecast.com at: 4 am (local time) / 17 Dec 2025
Now
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  | |  |  | |  | | | | | | | |
rain shwrs | snow shwrs | light snow | snow shwrs | some clouds | cloudy | cloudy | cloudy | snow shwrs | clear | clear | some clouds | cloudy | cloudy | some clouds | clear | some clouds | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | 2 | 1 | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | |
1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 5 | 6 | -4 | -11 | -7 | 2 | 6 | 6 | 2 | -5 | -4 | -5 | -1 | 2 | 3 | 7 | 7 | 6 |
min °C | 5 | 0 | -13 | -14 | -8 | -7 | 4 | 4 | -8 | -9 | -6 | -7 | -5 | -1 | 1 | 4 | 6 | -1 |
0 | -8 | -28 | -28 | -15 | -12 | -1 | -2 | -18 | -18 | -15 | -16 | -10 | -6 | -4 | -1 | 2 | -5 | |
66 | 92 | 85 | 78 | 52 | 53 | 47 | 50 | 85 | 57 | 67 | 47 | 50 | 65 | 64 | 53 | 54 | 80 | |
2850 | 1950 | 850 | 0 | 550 | 2300 | 3050 | 2750 | 750 | 1200 | 950 | 1000 | 1750 | 2300 | 3050 | 3300 | 3300 | 2650 | |
 | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — |
 | — | 4:16 | — | — | 4:16 | — | — | 4:17 | — | — | 4:17 | — | — | 4:17 | — | — | 4:19 | — |
Next 0-3 days weather summary:
Mild with light rain (total 3.0mm) on Wed afternoon Becoming colder with a light covering of snow, mostly falling on Fri night. Freeze-thaw conditions (max 6°C on Wed afternoon, min -14°C on Thu morning). Winds decreasing (severe gales from the NW on Wed night, light winds from the W by Thu night).
Next 4-6 days weather summary:
Mostly dry. Freeze-thaw conditions (max 7°C on Mon morning, min -9°C on Sat morning). Winds decreasing (strong winds from the WNW on Sat afternoon, light winds from the SW by Sat night).
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Snow Radar
Latest snow reports near Deer Mountain:
Deer Mountain Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in USA - South Dakota are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.3 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
1.1 | Powder days Fresh snow, limited sun, any wind. |
1.6 | Bluebird days Average snow, mostly sunny, light wind. |
Deer Mountain Forecast Snowfall
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Other resorts in USA - South Dakota are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Deer Mountain at the specific elevation of 1830 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Deer 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.
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