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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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Biwako Valley at 950 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 | |
 |  |  |  |  |  | |  |  | |  | | | | | |  | |
some clouds | light snow | light snow | snow shwrs | snow shwrs | clear | clear | mod. rain | mod. rain | snow shwrs | mod. snow | light snow | light snow | snow shwrs | clear | clear | some clouds | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | 3 | 2 | 1 | — | — | — | — | — | 2 | 5 | 2 | 1 | — | — | — | — | |
— | 2 | — | — | — | — | — | 8 | 10 | — | — | — | — | — | — | — | — | |
max °C | 7 | 5 | -3 | -3 | -1 | 2 | 3 | 4 | 3 | 1 | 0 | -1 | -1 | -1 | 2 | 3 | 3 |
min °C | 7 | -3 | -3 | -4 | -4 | 1 | 2 | 3 | 3 | 0 | -1 | -1 | -1 | -1 | 1 | 2 | 2 |
2 | -12 | -12 | -13 | -12 | 1 | -2 | -1 | -3 | -8 | -8 | -6 | -6 | -4 | -3 | -3 | -3 | |
69 | 92 | 89 | 87 | 58 | 32 | 28 | 72 | 99 | 83 | 96 | 97 | 96 | 87 | 72 | 70 | 81 | |
1900 | 1300 | 500 | 500 | 500 | 1150 | 1750 | 2000 | 1700 | 1100 | 900 | 750 | 850 | 850 | 1050 | 1300 | 1400 | |
 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — |
 | 4:44 | — | — | 4:44 | — | — | 4:44 | — | — | 4:45 | — | — | 4:45 | — | — | 4:45 | — |
Next 0-3 days weather summary:
A light covering of new snow, mostly falling on Thu night will be washed away by heavy rain (total 20.0mm) on Sun morning. Freeze-thaw conditions (max 7°C on Thu afternoon, min -4°C on Fri afternoon). Winds decreasing (strong winds from the NNW on Fri morning, calm by Sat morning).
Next 4-6 days weather summary:
A moderate fall of snow, heaviest on Sun night. Freeze-thaw conditions (max 4°C on Wed morning, min -1°C on Sun night). Winds decreasing (near gales from the WNW on Sun afternoon, light winds from the NW by Mon night).
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Latest snow reports near Biwako Valley:
Biwako Valley Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 4 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Shiga 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. |
|---|---|
0.1 | Powder days Fresh snow, limited sun, any wind. |
0.4 | Bluebird days Average snow, mostly sunny, light wind. |
Biwako Valley Forecast Snowfall
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Other resorts in Japan - Shiga are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Biwako Valley at the specific elevation of 950 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Biwako Valley. 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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