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Japan Weekly Snow Roundup #292
Weekly Snow News for Japan, updated 10 December 2025: early-season bases deepen rapidly as Siberian air drives repeated snow across Hokkaido and Honshu
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Chateau Shiozawa at 394 m altitude
Issued by Snow-Forecast.com at: 2 pm (local time) / 11 Dec 2025
Now
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  |  | | | |  | | |  | |
some clouds | heavy snow | mod. snow | light snow | light snow | clear | some clouds | cloudy | light rain | mod. rain | light snow | light snow | light snow | snow shwrs | some clouds | some clouds | light rain | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | 18 | 5 | 5 | 4 | — | — | — | — | — | 2 | 3 | 2 | 1 | — | — | — | |
— | 7 | — | — | — | — | — | — | 4 | 9 | 3 | — | — | — | — | — | 1 | |
max °C | 9 | 5 | -2 | -2 | -2 | 1 | 2 | 4 | 5 | 5 | 2 | 1 | 1 | 1 | 4 | 4 | 3 |
min °C | 6 | -2 | -2 | -2 | -3 | -1 | 0 | 0 | 4 | 4 | 1 | 1 | 1 | -2 | 3 | 2 | 1 |
5 | -9 | -9 | -8 | -5 | -1 | -2 | -4 | 4 | -1 | -5 | -4 | -4 | -2 | 3 | 0 | -1 | |
70 | 99 | 93 | 93 | 96 | 81 | 82 | 79 | 98 | 99 | 91 | 88 | 86 | 91 | 75 | 82 | 82 | |
1850 | 550 | 0 | 0 | 0 | 300 | 750 | 1750 | 1600 | 1450 | 650 | 500 | 600 | 350 | 850 | 1150 | 1000 | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — |
 | 4:27 | — | — | 4:27 | — | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — |
Next 0-3 days weather summary:
Moderate rain (total 11.0mm) on Thu night. Becoming colder with heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 9°C on Thu afternoon, min -3°C on Fri night). Wind will be generally light.
Next 4-6 days weather summary:
Heavy rain (total 22.0mm), mainly falling Sun afternoon. Becoming colder with a light covering of snow, mostly falling on Mon morning. Freeze-thaw conditions (max 5°C on Sun afternoon, min -2°C on Mon night). Winds decreasing (fresh winds from the WNW on Sun night, calm by Tue morning).
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Latest snow reports near Chateau Shiozawa:
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Chateau Shiozawa Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 5 cm |
| Last snowfall: | 9 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Niigata are reporting: powder (0) / good piste (0)
Snow History
Week 2 of December has on average:
0.0 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.5 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
Chateau Shiozawa Forecast Snowfall
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Other resorts in Japan - Niigata are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Chateau Shiozawa at the specific elevation of 394 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Chateau Shiozawa. 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 Japan.
Click here to read further information on freezing levels and how we forecast our temperatures.
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