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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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Osa at 865 m altitude
Issued by Snow-Forecast.com at: 2 am (local time) / 11 Dec 2025
Now
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  |  | | | | | | | | |  | |
light rain | light rain | light snow | light snow | clear | clear | some clouds | rain shwrs | heavy rain | light snow | light snow | light snow | light snow | some clouds | clear | clear | some clouds | cloudy | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | 1 | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | |
1 | 2 | 2 | — | — | — | — | 1 | 23 | — | — | — | — | — | — | — | — | — | |
max °C | 7 | 7 | 6 | -1 | -1 | 0 | 5 | 5 | 5 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 4 | 5 |
min °C | 7 | 6 | 0 | -2 | -2 | -1 | 2 | 4 | 3 | -1 | 0 | -1 | -1 | -1 | -1 | 2 | 3 | 4 |
4 | 2 | -6 | -8 | -7 | -5 | -1 | 0 | -4 | -9 | -8 | -9 | -8 | -5 | -4 | -2 | -2 | -1 | |
39 | 85 | 96 | 96 | 72 | 54 | 52 | 77 | 98 | 87 | 84 | 88 | 85 | 77 | 61 | 59 | 81 | 89 | |
2050 | 2100 | 1350 | 700 | 750 | 550 | 1600 | 1700 | 2000 | 800 | 850 | 850 | 800 | 950 | 800 | 1200 | 1350 | 1500 | |
 | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — |
 | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — |
Next 0-3 days weather summary:
A dusting of snow. Milder later with heavy rain (total 29.0mm) on Sat night. Freeze-thaw conditions (max 7°C on Thu morning, min -2°C on Fri morning). Winds increasing (calm on Fri night, strong winds from the WNW by Sat night).
Next 4-6 days weather summary:
A dusting of new snow. Freeze-thaw conditions (max 5°C on Tue night, min -1°C on Sun morning). Winds decreasing (strong winds from the WNW on Sun morning, light winds from the WNW by Mon night).
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Snow Radar
Latest snow reports near Osa:
Osa Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 4 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Hiroshima are reporting: powder (0) / good piste (0)
Snow History
Week 2 of December has on average:
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.6 | Powder days Fresh snow, limited sun, any wind. |
0.4 | Bluebird days Average snow, mostly sunny, light wind. |
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Other resorts in Japan - Hiroshima are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Osa at the specific elevation of 865 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Osa. 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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