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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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Chastreix-Sancy at 1730 m altitude
Issued by Snow-Forecast.com at: 6 pm (local time) / 17 Dec 2025
Now
Wed 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  |  | | | |  | |  |  |  |  | |
snow shwrs | some clouds | clear | some clouds | some clouds | cloudy | light rain | light snow | light rain | light rain | light snow | light snow | light snow | mod. snow | heavy snow | mod. snow | cloudy | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | — | — | — | — | — | — | 1 | — | — | 1 | 3 | 1 | 6 | 10 | 7 | — | |
— | — | — | — | — | — | 2 | 1 | 3 | 3 | 4 | — | — | — | — | — | — | |
max °C | 2 | 4 | 4 | 3 | 4 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | 1 | 0 | -1 | -1 | -1 |
min °C | 2 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 2 | 0 | 0 | -2 | -2 | -1 | -2 |
-2 | -3 | -3 | -3 | -3 | -3 | 0 | -1 | -3 | -3 | -4 | -5 | -7 | -8 | -9 | -4 | -5 | |
91 | 69 | 56 | 77 | 82 | 88 | 98 | 87 | 97 | 95 | 94 | 99 | 91 | 100 | 98 | 82 | 76 | |
2050 | 2150 | 2450 | 2500 | 2500 | 2200 | 2200 | 2200 | 2150 | 2200 | 2100 | 1900 | 1850 | 1400 | 1500 | 1600 | 1550 | |
 | — | — | 8:23 | — | — | 8:23 | — | — | 8:25 | — | — | 8:25 | — | — | 8:26 | — | — |
 | 5:06 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — |
Next 0-3 days weather summary:
A dusting of snow turning to light rain (total 6.0mm) on Sat morning. Temperatures will be slightly above freezing (max 4°C on Wed night, min 2°C on Wed afternoon). Winds decreasing (strong winds from the SW on Wed night, light winds from the SSE by Fri afternoon).
Next 4-6 days weather summary:
Light rain (total 7.0mm) on Sat afternoon. Becoming colder with heavy fall of snow, heaviest during Mon morning. Freeze-thaw conditions (max 3°C on Sat afternoon, min -3°C on Tue morning). Winds decreasing (near gales from the S on Sat night, light winds from the WNW by Mon night).
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Latest snow reports near Chastreix-Sancy:
Chastreix-Sancy Snow Conditions
| Top snow depth: | 0 cm |
|---|---|
| Bottom snow depth: | 0 cm |
| Fresh snowfall depth: | — |
| Last snowfall: | 4 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in France are reporting: powder (4) / good piste (4)
Snow History
Week 3 of December has on average:
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
1.3 | Powder days Fresh snow, limited sun, any wind. |
0.7 | Bluebird days Average snow, mostly sunny, light wind. |
Chastreix-Sancy Forecast Snowfall
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Other resorts in France are reporting: powder (4) / good piste (4)
The above table gives the weather forecast for Chastreix-Sancy at the specific elevation of 1730 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Chastreix-Sancy. 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 France.
Click here to read further information on freezing levels and how we forecast our temperatures.
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