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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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Trillevalen at 1600 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 snow | light snow | snow shwrs | light snow | clear | some clouds | light snow | light snow | cloudy | some clouds | some clouds | some clouds | cloudy | cloudy | cloudy | some clouds | clear | clear | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -3 | -3 | -1 | -2 | -2 | -2 | -5 | -4 | -5 | -4 | -4 | -4 | -4 | -4 | -4 | -5 | -5 | -5 |
min °C | -3 | -4 | -3 | -3 | -2 | -4 | -5 | -5 | -5 | -4 | -4 | -5 | -5 | -4 | -5 | -5 | -5 | -5 |
-12 | -15 | -14 | -12 | -11 | -14 | -16 | -17 | -15 | -12 | -10 | -5 | -9 | -7 | -9 | -10 | -11 | -10 | |
92 | 97 | 50 | 89 | 63 | 51 | 90 | 94 | 92 | 81 | 50 | 45 | 36 | 29 | 35 | 28 | 31 | 48 | |
400 | 900 | 0 | 650 | 1400 | 1400 | 800 | 850 | 850 | 750 | 550 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
 | 9:47 | — | — | 9:48 | — | — | 9:48 | — | — | 9:48 | — | — | 9:49 | — | — | 9:49 | — | — |
 | 2:18 | — | — | 2:18 | — | — | 2:19 | — | — | 2:19 | — | — | 2:21 | — | — | 2:21 | — | — |
Next 0-3 days weather summary:
A dusting of new snow. Temperatures will be below freezing (max -1°C on Thu night, min -5°C on Sat morning). Winds increasing (moderate winds from the S on Thu night, severe gales from the WNW by Sat morning).
Next 4-6 days weather summary:
Mostly dry. Temperatures will be below freezing (max -4°C on Sun morning, min -5°C on Sun night). Winds decreasing (fresh winds from the NW on Sun morning, calm by Sun night).
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Snow Radar
Latest snow reports near Trillevalen:
Trillevalen Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 2 cm |
| Last snowfall: | 17 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Sweden are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.4 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
2.4 | Powder days Fresh snow, limited sun, any wind. |
1.5 | Bluebird days Average snow, mostly sunny, light wind. |
Trillevalen Forecast Snowfall
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Other resorts in Sweden are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Trillevalen at the specific elevation of 1600 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Trillevalen. 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 Sweden.
Click here to read further information on freezing levels and how we forecast our temperatures.
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