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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 1030 m altitude
Issued by Snow-Forecast.com at: 8 pm (local time) / 10 Dec 2025
Now
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  |  |  |  |  |  | | | | | | | |
cloudy | light rain | light rain | snow shwrs | light snow | clear | clear | some clouds | cloudy | light snow | light snow | light snow | light snow | light snow | some clouds | clear | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
— | — | — | 1 | 1 | — | — | — | — | 2 | 1 | — | 1 | — | — | — | |
— | 1 | 2 | 2 | — | — | — | — | — | 16 | — | — | — | — | — | — | |
max °C | 5 | 5 | 6 | 3 | -3 | -3 | 0 | 4 | 4 | 5 | -1 | -1 | -1 | -1 | -1 | 0 |
min °C | 4 | 5 | 6 | -2 | -3 | -3 | -1 | 2 | 3 | 2 | -2 | -2 | -2 | -2 | -2 | -2 |
2 | 0 | 1 | -9 | -10 | -10 | -5 | -1 | 0 | -5 | -11 | -11 | -10 | -10 | -7 | -6 | |
39 | 37 | 89 | 97 | 97 | 74 | 44 | 52 | 84 | 95 | 91 | 86 | 89 | 87 | 81 | 71 | |
2100 | 2000 | 2000 | 1350 | 650 | 700 | 550 | 1550 | 1450 | 2300 | 850 | 850 | 850 | 750 | 900 | 750 | |
 | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — |
 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — |
Next 0-3 days weather summary:
Light rain (total 5.0mm) at first, then becoming colder with a dusting of snow on Fri morning. Freeze-thaw conditions (max 6°C on Thu afternoon, min -3°C on Fri morning). Winds decreasing (strong winds from the NW on Thu night, calm by Fri night).
Next 4-6 days weather summary:
Moderate rain (total 16.0mm) heaviest on Sat night, then becoming colder with a dusting of snow on Sat night. Freeze-thaw conditions (max 5°C on Sat night, min -2°C on Sun morning). Winds decreasing (near gales from the SSW on Sat night, light winds from the NW by Mon night).
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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:
0.2 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.8 | Powder days Fresh snow, limited sun, any wind. |
0.7 | 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 1030 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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