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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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Gray Rocks at 428 m altitude
Issued by Snow-Forecast.com at: 6 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 | |
 |  |  |  |  |  | | |  | | | | | | |  | |  | |
cloudy | some clouds | heavy rain | heavy rain | light snow | light snow | cloudy | light snow | mod. snow | light snow | light snow | light snow | cloudy | light snow | light snow | mod. snow | light snow | snow shwrs | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | 1 | 2 | — | — | 6 | 1 | 1 | — | — | 1 | 3 | 5 | 1 | — | |
— | — | 13 | 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 2 | 4 | 6 | 8 | -1 | -10 | -7 | -5 | -2 | -8 | -9 | -11 | -10 | -10 | -5 | -3 | -3 | -4 |
min °C | -2 | 2 | 5 | 2 | -4 | -10 | -9 | -7 | -4 | -9 | -10 | -14 | -13 | -10 | -9 | -4 | -4 | -13 |
-8 | -4 | 0 | -5 | -13 | -20 | -14 | -14 | -12 | -19 | -19 | -23 | -20 | -17 | -14 | -9 | -9 | -22 | |
74 | 63 | 87 | 99 | 94 | 89 | 61 | 67 | 96 | 83 | 86 | 87 | 77 | 92 | 90 | 96 | 98 | 88 | |
0 | 2250 | 2100 | 2150 | 300 | 0 | 0 | 0 | 50 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
 | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — |
 | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — | — | 4:15 | — | — | 4:15 | — | — | 4:15 | — |
Next 0-3 days weather summary:
Heavy rain (total 27.0mm), mainly falling Fri morning. Becoming colder with a light covering of snow, mostly falling on Sat night. Freeze-thaw conditions (max 8°C on Fri morning, min -10°C on Fri night). Winds decreasing (strong winds from the S on Fri morning, light winds from the WNW by Sat morning).
Next 4-6 days weather summary:
A moderate fall of snow, heaviest on Tue morning. Temperatures will be below freezing (max -3°C on Tue morning, min -14°C on Sun night). Winds decreasing (fresh winds from the W on Sun morning, light winds from the WSW by Mon night).
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Latest snow reports near Gray Rocks:
Gray Rocks Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 6 cm |
| Last snowfall: | 17 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Canada - Quebec are reporting: powder (0) / good piste (1)
Snow History
Week 3 of December has on average:
0.4 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
1.2 | Powder days Fresh snow, limited sun, any wind. |
1.3 | Bluebird days Average snow, mostly sunny, light wind. |
Gray Rocks Forecast Snowfall
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Other resorts in Canada - Quebec are reporting: powder (0) / good piste (1)
The above table gives the weather forecast for Gray Rocks at the specific elevation of 428 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Gray Rocks. 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 Canada.
Click here to read further information on freezing levels and how we forecast our temperatures.
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