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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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Komagane Kogen at 962 m altitude
Issued by Snow-Forecast.com at: 8 pm (local time) / 17 Dec 2025
Now
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  | |  |  |  |  |  | | | | |  |  | |
rain shwrs | clear | clear | clear | clear | some clouds | mod. rain | light rain | rain shwrs | cloudy | some clouds | light rain | mod. rain | light rain | light snow | snow shwrs | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | |
3 | — | — | — | — | — | 6 | 2 | 1 | — | — | 1 | 7 | 5 | 2 | — | |
max °C | 3 | 3 | 4 | 2 | 8 | 8 | 7 | 9 | 10 | 10 | 12 | 12 | 10 | 4 | 2 | 1 |
min °C | -1 | 0 | 1 | 0 | 6 | 5 | 5 | 8 | 10 | 10 | 11 | 11 | 5 | 3 | 2 | 0 |
-4 | -3 | 1 | -2 | 4 | 2 | 2 | 6 | 8 | 8 | 9 | 10 | 2 | 0 | -2 | -3 | |
98 | 73 | 63 | 79 | 41 | 57 | 84 | 98 | 93 | 90 | 92 | 82 | 98 | 97 | 99 | 96 | |
1350 | 1000 | 1600 | 1200 | 2150 | 2450 | 2500 | 2450 | 2600 | 2950 | 2850 | 2800 | 2700 | 1600 | 1350 | 1100 | |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — |
 | — | — | 4:37 | — | — | 4:37 | — | — | 4:37 | — | — | 4:37 | — | — | 4:37 | — |
Next 0-3 days weather summary:
Moderate rain (total 12.0mm), heaviest on Fri night. Freeze-thaw conditions (max 10°C on Sat afternoon, min -1°C on Wed night). Wind will be generally light.
Next 4-6 days weather summary:
Moderate rain (total 15.0mm) heaviest on Sun night, then becoming colder with a dusting of snow on Mon afternoon. Freeze-thaw conditions (max 12°C on Sun morning, min 0°C on Mon night). Wind will be generally light.
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Latest snow reports near Komagane Kogen:
48 km away from Komagane Kogen
4 hours ago
Rain and snow or hail reported from Suwa at 762 metres elevation 7 kms SSW of Kirigamine Ski Resort from Kirigamine
48 km away from Komagane Kogen
5 hours agoContinuous light rain reported from Suwa at 762 metres elevation 7 kms SSW of Kirigamine but it is forecast cold enough for snow at the ski area from Kirigamine
Komagane Kogen Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 15 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Nagano are reporting: powder (2) / good piste (2)
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Snow History
Week 3 of December has on average:
0.4 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.4 | Powder days Fresh snow, limited sun, any wind. |
0.6 | Bluebird days Average snow, mostly sunny, light wind. |
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Komagane Kogen 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 Komagane Kogen at the specific elevation of 962 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Komagane Kogen. 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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