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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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Yunomaru at 1838 m altitude
Issued by Snow-Forecast.com at: 2 am (local time) / 18 Dec 2025
Now
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | |  | | |  |  |  |  |  | | | |  |  | |
clear | clear | clear | clear | clear | light rain | clear | clear | some clouds | cloudy | light rain | light snow | snow shwrs | clear | clear | clear | some clouds | cloudy | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | 1 | — | — | — | — | 1 | — | — | — | — | — | — | — | |
max °C | -5 | -4 | -1 | 1 | 3 | 4 | 4 | 5 | 6 | 5 | 5 | 1 | -4 | -4 | -3 | -2 | -1 | -1 |
min °C | -6 | -5 | -3 | 0 | 2 | 3 | 3 | 4 | 5 | 5 | 3 | -4 | -5 | -5 | -4 | -3 | -2 | -3 |
-13 | -11 | -7 | -3 | -1 | -1 | -2 | -1 | 0 | 1 | 0 | -10 | -11 | -10 | -7 | -3 | -6 | -8 | |
74 | 70 | 55 | 38 | 41 | 47 | 86 | 73 | 71 | 75 | 83 | 96 | 94 | 73 | 62 | 67 | 58 | 77 | |
800 | 950 | 900 | 1850 | 2450 | 2550 | 2400 | 2650 | 2900 | 2950 | 2700 | 1450 | 950 | 1050 | 900 | 1150 | 1500 | 1000 | |
 | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — |
 | — | 4:32 | — | — | 4:32 | — | — | 4:32 | — | — | 4:34 | — | — | 4:34 | — | — | 4:35 | — |
Next 0-3 days weather summary:
Some drizzle, heaviest during Fri night. Freeze-thaw conditions (max 6°C on Sat night, min -6°C on Thu morning). Wind will be generally light.
Next 4-6 days weather summary:
Some drizzle, heaviest during Sun afternoon. Freeze-thaw conditions (max 5°C on Sun morning, min -5°C on Mon morning). Wind will be generally light.
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Latest snow reports near Yunomaru:
42 km away from Yunomaru
2 hours ago
Moderate to heavy freezing rain reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen but it is forecast cold enough for snow at the ski area from Iizuna Kogen
42 km away from Yunomaru
7 hours agoRain and snow or hail reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen Ski Resort from Iizuna Kogen
42 km away from Yunomaru
8 hours agoContinuous light rain reported from Nagano at 120 metres elevation 8 kms SE of Iizuna Kogen but it is forecast cold enough for snow at the ski area from Iizuna Kogen
Yunomaru Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 4 cm |
| Last snowfall: | 17 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Nagano are reporting: powder (2) / good piste (2)
Snow History
Week 3 of December has on average:
1.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.6 | Powder days Fresh snow, limited sun, any wind. |
2.9 | Bluebird days Average snow, mostly sunny, light wind. |
Yunomaru Forecast Snowfall
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Other resorts in Japan - Nagano are reporting: powder (2) / good piste (2)
The above table gives the weather forecast for Yunomaru at the specific elevation of 1838 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Yunomaru. 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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