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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 359 m altitude
Issued by Snow-Forecast.com at: 5 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 | light snow | some clouds | some clouds | cloudy | cloudy | cloudy | clear | clear | clear | some clouds | cloudy | light snow | cloudy | cloudy | some clouds | some clouds | cloudy | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 8 | -1 | -10 | -6 | -3 | 4 | 3 | 1 | -1 | -6 | -4 | -2 | 1 | 2 | 3 | 4 | 3 | 2 |
min °C | 4 | -6 | -12 | -10 | -4 | -3 | 2 | -1 | -8 | -8 | -5 | -4 | -1 | 2 | 2 | 2 | 0 | 0 |
-1 | -15 | -23 | -19 | -9 | -10 | -4 | -8 | -17 | -15 | -8 | -8 | -8 | -4 | -3 | -2 | -3 | -2 | |
98 | 75 | 73 | 57 | 41 | 52 | 67 | 43 | 52 | 52 | 38 | 49 | 40 | 51 | 78 | 72 | 57 | 71 | |
1800 | 200 | 0 | 0 | 0 | 0 | 2050 | 650 | 0 | 0 | 0 | 0 | 0 | 3300 | 3200 | 2900 | 2750 | 0 | |
 | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — | 7:30 | — | — |
 | — | 4:30 | — | — | 4:30 | — | — | 4:31 | — | — | 4:31 | — | — | 4:32 | — | — | 4:32 | — |
Next 0-3 days weather summary:
Light rain (total 5.0mm), mostly falling on Thu morning. Freeze-thaw conditions (max 8°C on Thu morning, min -12°C on Thu night). Mainly strong winds.
Next 4-6 days weather summary:
Mostly dry. Freeze-thaw conditions (max 4°C on Tue morning, min -8°C on Sun morning). Winds increasing (calm on Sun afternoon, fresh winds from the S by Mon morning).
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. |
|---|---|
0.4 | Powder days Fresh snow, limited sun, any wind. |
1.1 | 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 359 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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