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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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Castleside at 634 m altitude
Issued by Snow-Forecast.com at: 5 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 | |
 |  |  |  |  | |  |  |  | |  | | | | | | | |
rain shwrs | mod. rain | cloudy | light rain | rain shwrs | rain shwrs | some clouds | some clouds | clear | clear | light rain | light rain | light rain | light rain | light rain | light rain | light rain | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
1 | 8 | — | 4 | 1 | 1 | — | — | — | — | 1 | 3 | 5 | 5 | 3 | 3 | 1 | |
max °C | 7 | 7 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 5 | 5 | 6 | 5 | 5 | 4 |
min °C | 6 | 4 | 4 | 4 | 2 | 3 | 3 | 2 | 2 | 3 | 1 | 4 | 5 | 5 | 5 | 5 | 3 |
0 | -2 | -1 | -2 | -6 | -4 | -4 | -4 | -4 | -3 | -5 | -1 | 0 | 0 | 1 | 2 | -2 | |
91 | 92 | 62 | 98 | 66 | 87 | 81 | 80 | 85 | 82 | 83 | 99 | 99 | 98 | 87 | 98 | 88 | |
2500 | 1750 | 1700 | 1300 | 950 | 1100 | 1050 | 1200 | 1300 | 1300 | 1000 | 1400 | 1600 | 1700 | 1600 | 1650 | 1500 | |
 | — | — | 8:26 | — | — | 8:27 | — | — | 8:27 | — | — | 8:29 | — | — | 8:29 | — | — |
 | 3:40 | — | — | 3:40 | — | — | 3:40 | — | — | 3:41 | — | — | 3:41 | — | — | 3:41 | — |
Next 0-3 days weather summary:
Moderate rain (total 15.0mm), heaviest on Wed night. Mild temperatures (max 7°C on Wed afternoon, min 2°C on Thu night). Winds decreasing (near gales from the SW on Thu night, moderate winds from the SSW by Fri night).
Next 4-6 days weather summary:
Heavy rain (total 24.0mm), heaviest during Sun afternoon. Mild temperatures (max 6°C on Sun night, min 1°C on Sat night). Mainly fresh winds.
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Snow Radar
Latest snow reports near Castleside:
Castleside Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 5 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in United Kingdom are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.5 | Powder days Fresh snow, limited sun, any wind. |
0.3 | Bluebird days Average snow, mostly sunny, light wind. |
Castleside Forecast Snowfall
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Other resorts in United Kingdom are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Castleside at the specific elevation of 634 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Castleside. 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 Kingdom.
Click here to read further information on freezing levels and how we forecast our temperatures.
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