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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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Iwakisan Hyakuzawa at 784 m altitude
Issued by Snow-Forecast.com at: 8 am (local time) / 11 Dec 2025
Now
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | | |  | | |  | | | |  | | | |
light snow | mod. snow | mod. snow | light snow | light snow | light snow | light snow | light snow | cloudy | light snow | light snow | heavy snow | light snow | light snow | light snow | snow shwrs | light snow | mod. snow | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
3 | 10 | 8 | 3 | 2 | 2 | — | — | — | 1 | 4 | 13 | 4 | — | — | — | 2 | 6 | |
8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 3 | 1 | -6 | -10 | -9 | -7 | -5 | -5 | -2 | 0 | -1 | -1 | -3 | -5 | -4 | -1 | 0 | 1 |
min °C | 2 | -4 | -10 | -10 | -10 | -8 | -6 | -6 | -5 | -1 | -1 | -2 | -5 | -5 | -5 | -2 | -1 | 0 |
-5 | -11 | -21 | -22 | -22 | -18 | -14 | -12 | -11 | -6 | -9 | -11 | -14 | -14 | -14 | -9 | -7 | -6 | |
95 | 97 | 87 | 86 | 84 | 82 | 77 | 77 | 63 | 80 | 96 | 98 | 93 | 81 | 83 | 75 | 96 | 90 | |
1150 | 900 | 0 | 0 | 0 | 0 | 0 | 250 | 0 | 450 | 650 | 550 | 350 | 150 | 200 | 500 | 650 | 900 | |
 | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — |
 | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:10 | — | — | 4:12 | — | — | 4:12 | — |
Next 0-3 days weather summary:
Light rain (total 8.0mm) on Thu morning. Becoming colder with heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 3°C on Thu morning, min -10°C on Thu night). Winds decreasing (near gales from the WSW on Thu morning, light winds from the SSW by Sat night).
Next 4-6 days weather summary:
A heavy fall of snow, heaviest during Sun night. Freeze-thaw conditions (max 1°C on Tue night, min -5°C on Mon morning). Mainly strong winds.
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Latest snow reports near Iwakisan Hyakuzawa:
Iwakisan Hyakuzawa Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 7 cm |
| Last snowfall: | 10 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Hyakuzawa are reporting: powder (0) / good piste (0)
Snow History
Week 2 of December has on average:
0.6 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
3.1 | Powder days Fresh snow, limited sun, any wind. |
0.1 | 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 784 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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