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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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Mountain Park Tsunan at 309 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 | clear | clear | clear | clear | some clouds | cloudy | mod. rain | heavy rain | light snow | light snow | clear | some clouds | some clouds | some clouds | light rain | light rain | light snow | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | 1 | |
— | — | — | — | — | — | — | 7 | 15 | — | — | — | — | — | — | 1 | 2 | 14 | |
max °C | 9 | 8 | 3 | 13 | 13 | 9 | 13 | 11 | 6 | 2 | 2 | -2 | 8 | 8 | 4 | 8 | 8 | 6 |
min °C | 4 | 3 | 3 | 9 | 8 | 8 | 12 | 8 | 2 | 2 | 1 | -3 | 4 | 2 | 1 | 6 | 7 | 2 |
3 | 1 | 1 | 8 | 6 | 6 | 11 | 6 | -1 | 0 | 1 | -5 | 4 | -1 | -2 | 3 | 6 | -1 | |
68 | 76 | 69 | 80 | 78 | 79 | 77 | 93 | 96 | 98 | 83 | 82 | 58 | 59 | 68 | 68 | 80 | 97 | |
1950 | 2500 | 2550 | 2550 | 2650 | 2950 | 2800 | 2650 | 1000 | 500 | 500 | 0 | 1800 | 2150 | 2450 | 2900 | 2600 | 950 | |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 4:30 | — | — | 4:30 | — | — | 4:30 | — | — | 4:31 | — | — | 4:31 | — | — | 4:32 | — |
Next 0-3 days weather summary:
Heavy rain (total 22.0mm), heaviest during Sun afternoon. Very mild (max 13°C on Sat morning, min 2°C on Sun night). Wind will be generally light.
Next 4-6 days weather summary:
A dusting of snow giving way to moderate rain (total 17.0mm) heaviest on Wed night. Freeze-thaw conditions (max 8°C on Tue morning, min -3°C on Mon night). Wind will be generally light.
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Latest snow reports near Mountain Park Tsunan:
36 km away from Mountain Park Tsunan
7 hours ago
Partly cloudy at Madarao Kogen. Just a light breeze today. Feeling cold here today. There is a dusting of fresh snow. Packed snow on piste. The off-piste has an icy crust. from Madarao Kogen
Mountain Park Tsunan Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 16 cm |
| Last snowfall: | 18 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Niigata 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. |
|---|---|
0.6 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
Mountain Park Tsunan Forecast Snowfall
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Other resorts in Japan - Niigata are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Mountain Park Tsunan at the specific elevation of 309 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Mountain Park Tsunan. 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.
Visitor Reviews of Mountain Park Tsunan
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