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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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Iwakisan Hyakuzawa at 346 m altitude
Issued by Snow-Forecast.com at: 8 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 | |
 |  |  | | |  |  |  |  |  | | | | |  |  |  |  | |
light snow | some clouds | light snow | some clouds | some clouds | some clouds | rain shwrs | light rain | mod. rain | heavy rain | heavy rain | light snow | light snow | some clouds | clear | clear | cloudy | cloudy | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | |
— | — | — | — | — | — | 1 | 2 | 7 | 12 | 11 | — | — | — | — | — | — | — | |
max °C | -1 | -1 | 0 | 4 | 4 | 3 | 8 | 9 | 9 | 10 | 6 | 2 | -1 | -1 | -3 | 2 | 2 | 2 |
min °C | -2 | -2 | -2 | 1 | 1 | 1 | 7 | 8 | 9 | 9 | 3 | -2 | -1 | -2 | -3 | -1 | 0 | 0 |
-8 | -8 | -8 | -1 | -2 | -3 | 3 | 5 | 6 | 6 | 0 | -8 | -6 | -5 | -5 | -3 | 0 | -2 | |
68 | 66 | 79 | 91 | 85 | 67 | 79 | 89 | 94 | 81 | 95 | 83 | 66 | 62 | 71 | 55 | 50 | 56 | |
0 | 250 | 350 | 600 | 1100 | 2100 | 2000 | 2150 | 2300 | 2500 | 1600 | 450 | 0 | 0 | 0 | 0 | 900 | 1250 | |
 | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 4:13 | — | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — | — | 4:15 | — |
Next 0-3 days weather summary:
Moderate rain (total 10.0mm), heaviest on Sat night. Freeze-thaw conditions (max 9°C on Sat afternoon, min -2°C on Thu morning). Wind will be generally light.
Next 4-6 days weather summary:
Heavy rain (total 23.0mm), heaviest during Sun morning. Later becoming colder with a dusting of snow on Sun night. Freeze-thaw conditions (max 10°C on Sun morning, min -3°C on Mon night). Winds decreasing (fresh winds from the SW on Sun morning, calm by Tue morning).
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Latest snow reports near Iwakisan Hyakuzawa:
41 km away from Iwakisan Hyakuzawa
58 minutes ago
Continuous light snow reported from Aomori at 242 metres elevation 9 kms NW of Moya Hills Ski Resort from Moya Hills
41 km away from Iwakisan Hyakuzawa
6 hours agoFreezing rain reported from Aomori at 242 metres elevation 9 kms NW of Moya Hills but it is forecast cold enough for snow at the ski area from Moya Hills
43 km away from Iwakisan Hyakuzawa
11 hours ago
It is snowing steadily at Hakkoda. from Hakkoda
Iwakisan Hyakuzawa 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 - Hyakuzawa are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
2.7 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
Iwakisan Hyakuzawa Forecast Snowfall
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Other resorts in Japan - Hyakuzawa are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Iwakisan Hyakuzawa at the specific elevation of 346 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Iwakisan Hyakuzawa. 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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