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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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Sundown Mountain at 287 m altitude
Issued by Snow-Forecast.com at: 11 am (local time) / 17 Dec 2025
Now
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  | | |  | | | | | |  | |
some clouds | clear | light rain | heavy rain | snow shwrs | light snow | clear | cloudy | cloudy | cloudy | clear | clear | some clouds | cloudy | light snow | cloudy | cloudy | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | |
— | — | 1 | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 2 | 3 | 7 | 4 | -1 | -10 | -7 | -4 | 2 | 3 | 1 | -2 | -4 | -2 | -3 | -1 | -1 | -1 |
min °C | -1 | 1 | 3 | 4 | -5 | -11 | -10 | -5 | -3 | 2 | -2 | -4 | -5 | -3 | -3 | -2 | -1 | -2 |
-4 | -4 | -3 | -1 | -14 | -22 | -18 | -9 | -9 | -3 | -9 | -11 | -11 | -3 | -6 | -8 | -6 | -7 | |
78 | 80 | 83 | 98 | 71 | 74 | 64 | 46 | 56 | 64 | 47 | 60 | 50 | 38 | 67 | 78 | 78 | 90 | |
0 | 2450 | 3000 | 1350 | 150 | 0 | 0 | 0 | 0 | 2250 | 750 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
 | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — |
 | — | 4:30 | — | — | 4:30 | — | — | 4:30 | — | — | 4:31 | — | — | 4:31 | — | — | 4:32 | — |
Next 0-3 days weather summary:
Moderate rain (total 12.0mm), heaviest on Thu morning. Freeze-thaw conditions (max 7°C on Wed night, min -11°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the W by Thu afternoon).
Next 4-6 days weather summary:
A dusting of new snow. Freeze-thaw conditions (max 3°C on Sat morning, min -5°C on Sun morning). Winds decreasing (fresh winds from the NW on Sat afternoon, calm by Sun afternoon).
Popular Sundown Mountain Pages
Snow Radar
Latest snow reports near Sundown Mountain:
Sundown Mountain Snow Conditions
| Top snow depth: | 64 cm |
|---|---|
| Bottom snow depth: | 28 cm |
| Fresh snowfall depth: | — |
| Last snowfall: | 6 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in USA - Iowa 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. |
1.5 | Bluebird days Average snow, mostly sunny, light wind. |
Sundown Mountain Forecast Snowfall
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Other resorts in USA - Iowa are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Sundown Mountain at the specific elevation of 287 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Sundown Mountain. 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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