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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 950 m altitude
Issued by Snow-Forecast.com at: 8 am (local time) / 19 Dec 2025
Now
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  | |  | | |  | | |  |  | |  | |
clear | some clouds | some clouds | cloudy | some clouds | cloudy | light rain | light rain | rain shwrs | some clouds | some clouds | clear | some clouds | cloudy | light rain | heavy rain | heavy rain | snow shwrs | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | 2 | 4 | 2 | — | — | — | — | — | 2 | 24 | 13 | 2 | |
max °C | 7 | 8 | 7 | 8 | 9 | 9 | 10 | 8 | 5 | 3 | 3 | 2 | 5 | 6 | 6 | 8 | 8 | 4 |
min °C | 6 | 6 | 6 | 8 | 9 | 9 | 9 | 6 | 1 | 2 | 2 | 2 | 4 | 5 | 5 | 8 | 6 | -1 |
4 | 3 | 2 | 5 | 6 | 6 | 6 | 1 | -6 | -5 | -4 | 2 | 1 | 0 | -1 | 3 | 1 | -9 | |
30 | 25 | 84 | 93 | 83 | 81 | 92 | 97 | 84 | 50 | 44 | 50 | 80 | 82 | 90 | 95 | 97 | 91 | |
2550 | 2650 | 2400 | 2650 | 2750 | 2950 | 2900 | 2700 | 1300 | 1350 | 1400 | 1800 | 2000 | 2250 | 2300 | 2650 | 2500 | 1250 | |
 | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | 4:45 | — | — | 4:46 | — | — | 4:46 | — | — | 4:47 | — | — | 4:47 | — | — | 4:49 | — |
Next 0-3 days weather summary:
Light rain (total 8.0mm), mostly falling on Sun afternoon. Very mild (max 10°C on Sun morning, min 1°C on Sun night). Winds increasing (light winds from the SSW on Fri morning, strong winds from the NNW by Sun night).
Next 4-6 days weather summary:
Heavy rain (total 41.0mm), heaviest during Wed morning. Freeze-thaw conditions (max 8°C on Wed morning, min -1°C on Wed night). Winds increasing (calm on Mon night, gales from the SE by Tue 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: | 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. |
|---|---|
0.5 | Powder days Fresh snow, limited sun, any wind. |
1.0 | 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 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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