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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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Biwako Valley at 1174 m altitude
Issued by Snow-Forecast.com at: 8 pm (local time) / 18 Dec 2025
Now
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | |  |  |  | | | |  | |  | |
clear | clear | some clouds | some clouds | clear | clear | some clouds | light rain | mod. rain | snow shwrs | some clouds | clear | clear | cloudy | cloudy | cloudy | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | 1 | 6 | 1 | — | — | — | — | — | — | |
max °C | 5 | 6 | 7 | 6 | 8 | 9 | 9 | 9 | 7 | 3 | 1 | 2 | 3 | 4 | 4 | 5 |
min °C | 3 | 6 | 6 | 6 | 7 | 9 | 8 | 9 | 5 | -2 | -1 | 2 | 2 | 3 | 4 | 3 |
0 | 4 | 2 | 2 | 3 | 6 | 5 | 6 | 0 | -10 | -9 | -4 | 1 | -1 | -1 | -4 | |
26 | 21 | 17 | 68 | 73 | 62 | 81 | 86 | 97 | 93 | 60 | 30 | 28 | 83 | 87 | 86 | |
2150 | 2550 | 2700 | 2450 | 2700 | 2750 | 3000 | 2950 | 2700 | 1300 | 1050 | 1600 | 1900 | 1900 | 2200 | 3000 | |
 | — | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | — | 4:45 | — | — | 4:46 | — | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — |
Next 0-3 days weather summary:
Light rain (total 7.0mm), mostly falling on Sun afternoon. Mild temperatures (max 9°C on Sat afternoon, min 3°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sun afternoon).
Next 4-6 days weather summary:
Heavy rain (total 43.0mm), heaviest during Wed afternoon. Freeze-thaw conditions (max 8°C on Wed morning, min -2°C on Sun night). Winds increasing (calm on Mon night, gales from the SE by Wed morning).
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Snow Radar
Latest snow reports near Biwako Valley:
Biwako Valley Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 14 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Shiga are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.8 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.8 | Powder days Fresh snow, limited sun, any wind. |
2.0 | 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 1174 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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