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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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Swiss Valley at 336 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 | |
 |  |  |  |  |  | | |  | |  | | | | | | | | |
light rain | mod. rain | light snow | light snow | cloudy | cloudy | cloudy | cloudy | some clouds | cloudy | some clouds | some clouds | some clouds | light rain | cloudy | some clouds | some clouds | cloudy | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
2 | 8 | 2 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
max °C | 9 | 10 | 3 | -7 | -4 | 0 | 5 | 4 | 0 | -5 | -5 | -5 | 0 | 2 | 4 | 5 | 3 | 0 |
min °C | 8 | 5 | -8 | -8 | -5 | -4 | 3 | 2 | -7 | -6 | -5 | -6 | -4 | 2 | 3 | 3 | 1 | 0 |
3 | 0 | -18 | -18 | -13 | -8 | -3 | -3 | -16 | -14 | -12 | -8 | -10 | -3 | -2 | -2 | -3 | -3 | |
87 | 93 | 79 | 86 | 71 | 55 | 48 | 63 | 62 | 61 | 57 | 70 | 50 | 34 | 64 | 85 | 75 | 86 | |
2550 | 2450 | 0 | 0 | 0 | 0 | 2900 | 950 | 200 | 0 | 0 | 0 | 0 | 1850 | 3150 | 3100 | 2650 | 0 | |
 | 8:04 | — | — | 8:06 | — | — | 8:06 | — | — | 8:07 | — | — | 8:07 | — | — | 8:07 | — | — |
 | — | 5:13 | — | — | 5:14 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — |
Next 0-3 days weather summary:
Moderate rain (total 12.0mm) heaviest on Thu afternoon, then becoming colder with a dusting of snow on Fri morning. Freeze-thaw conditions (max 10°C on Thu afternoon, min -8°C on Thu night). Winds decreasing (near gales from the SSW on Thu afternoon, light winds from the SW by Fri night).
Next 4-6 days weather summary:
Some drizzle, heaviest during Mon afternoon. Freeze-thaw conditions (max 5°C on Tue morning, min -6°C on Sun morning). Winds decreasing (fresh winds from the WNW on Sun morning, calm by Tue night).
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Snow Radar
Latest snow reports near Swiss Valley:
Swiss Valley Snow Conditions
| Top snow depth: | 122 cm |
|---|---|
| Bottom snow depth: | 30 cm |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in USA - Michigan are reporting: powder (0) / good piste (1)
Snow History
Week 3 of December has on average:
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.6 | Powder days Fresh snow, limited sun, any wind. |
1.1 | Bluebird days Average snow, mostly sunny, light wind. |
Swiss Valley Forecast Snowfall
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Photos of Swiss Valley
The captivating view of Saint Moritz lake by Namrata Baruah
Upload new photo Other resorts in USA - Michigan are reporting: powder (0) / good piste (1)
The above table gives the weather forecast for Swiss Valley at the specific elevation of 336 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Swiss Valley. 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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