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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: 2 pm (local time) / 11 Dec 2025
Now
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  |  |  | |  | | |  | |  |  | |
light rain | snow shwrs | snow shwrs | clear | clear | some clouds | cloudy | heavy rain | light snow | light snow | light snow | light snow | some clouds | some clouds | some clouds | rain shwrs | light rain | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | — | — | — | — | — | — | — | 3 | — | 1 | — | — | — | — | — | — | |
1 | 2 | — | — | — | — | — | 23 | — | — | — | — | — | — | — | 1 | 4 | |
max °C | 6 | 4 | -2 | -2 | 0 | 4 | 4 | 4 | -1 | -1 | -1 | -1 | -1 | 0 | 3 | 3 | 4 |
min °C | 5 | -2 | -3 | -2 | -1 | 2 | 4 | 2 | -2 | -2 | -2 | -2 | -1 | -1 | 2 | 3 | 3 |
0 | -9 | -10 | -8 | -5 | -2 | 1 | -5 | -11 | -11 | -10 | -10 | -6 | -6 | -4 | -2 | -3 | |
85 | 97 | 84 | 73 | 44 | 63 | 83 | 99 | 87 | 85 | 87 | 86 | 86 | 57 | 90 | 86 | 93 | |
2100 | 1400 | 650 | 750 | 750 | 1700 | 1600 | 1950 | 900 | 850 | 800 | 800 | 950 | 950 | 1250 | 1450 | 1500 | |
 | — | — | 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:
Heavy rain (total 26.0mm), heaviest during Sat night. Later becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 6°C on Thu afternoon, min -3°C on Fri morning). Winds increasing (light winds from the ESE on Fri night, near gales from the WNW by Sun morning).
Next 4-6 days weather summary:
A dusting of snow turning to light rain (total 7.0mm) on Tue afternoon. Freeze-thaw conditions (max 4°C on Tue night, min -2°C on Sun afternoon). Winds decreasing (strong winds from the WNW on Sun afternoon, light winds from the W 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:
0.2 | 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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