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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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Iwanai Resort at 365 m altitude
Issued by Snow-Forecast.com at: 2 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 | |
 |  |  | |  | |  | | | | |  | | | | |  | | |
some clouds | cloudy | light snow | cloudy | light rain | light snow | light snow | light snow | light snow | light snow | light snow | cloudy | some clouds | cloudy | cloudy | light rain | mod. rain | light snow | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | 1 | 4 | 2 | 3 | 2 | — | — | — | — | — | — | — | 2 | |
— | — | 3 | — | 1 | 4 | — | — | — | — | — | — | — | — | — | 5 | 10 | 4 | |
max °C | 1 | 0 | 5 | 6 | 5 | 4 | 1 | 0 | -3 | -4 | -4 | -5 | -2 | -2 | 1 | 2 | 5 | 2 |
min °C | -2 | -1 | 0 | 5 | 3 | 1 | 0 | -2 | -5 | -4 | -5 | -6 | -5 | -5 | -4 | 2 | 3 | -6 |
-4 | -4 | -4 | 1 | 0 | -1 | -2 | -6 | -13 | -10 | -9 | -11 | -8 | -9 | -8 | -2 | -2 | -14 | |
64 | 76 | 97 | 88 | 94 | 99 | 99 | 98 | 83 | 79 | 68 | 71 | 77 | 66 | 74 | 95 | 98 | 96 | |
0 | 300 | 1100 | 1350 | 1600 | 2000 | 1450 | 450 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1150 | 1700 | 50 | |
 | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — |
 | — | 4:05 | — | — | 4:05 | — | — | 4:05 | — | — | 4:06 | — | — | 4:06 | — | — | 4:07 | — |
Next 0-3 days weather summary:
Mild at first with light rain (total 8.0mm) on Fri night followed by colder weather and light fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 6°C on Sat morning, min -5°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 19.0mm) heaviest on Wed afternoon. Freeze-thaw conditions (max 5°C on Wed afternoon, min -6°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the S by Wed afternoon).
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Latest snow reports near Iwanai Resort:
17 km away from Iwanai Resort
1 hour ago
Freezing rain reported from Kutchan at 179 metres elevation only 4 kms E of Niseko Hanazono Resort but it is forecast cold enough for snow at the ski area from Niseko Hanazono Resort
46 km away from Iwanai Resort
4 hours agoFreezing rain reported from Otaru at 26 metres elevation only 3 kms ENE of Otaru Tenguyama but it is forecast cold enough for snow at the ski area from Otaru Tenguyama
Iwanai Resort Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 17 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.0 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
6.0 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
Iwanai Resort Forecast Snowfall
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Photos of Iwanai Resort
Upload new photo Other resorts in Japan are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Iwanai Resort at the specific elevation of 365 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Iwanai Resort. 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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