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Japan Weekly Snow Roundup #298
Weekly Snow News for Japan, updated 21 January 2026: Japan leads global snowfall again, with 1m (40") in 72 hours on Hokkaido and heavy, cold powder spreading into Honshu.
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Koumi Riekkusu Ski Valley at 1590 m altitude
Issued by Snow-Forecast.com at: 2 pm (local time) / 23 Jan 2026
Now
Fri 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  |  | | | | |  | | | | |
cloudy | some clouds | snow shwrs | snow shwrs | light snow | snow shwrs | clear | clear | some clouds | some clouds | some clouds | clear | clear | snow shwrs | cloudy | some clouds | some clouds | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | — | — | 2 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | -6 | -9 | -7 | -7 | -9 | -9 | -10 | -12 | -7 | -6 | -8 | -2 | -1 | -6 | -6 | -6 | -10 |
min °C | -8 | -10 | -8 | -9 | -12 | -11 | -11 | -13 | -11 | -8 | -9 | -6 | -4 | -9 | -8 | -9 | -11 |
-14 | -17 | -14 | -16 | -19 | -18 | -19 | -21 | -17 | -12 | -13 | -11 | -10 | -16 | -14 | -15 | -17 | |
43 | 78 | 70 | 72 | 87 | 75 | 51 | 61 | 54 | 42 | 75 | 47 | 50 | 79 | 77 | 51 | 84 | |
800 | 0 | 400 | 600 | 0 | 0 | 250 | 0 | 0 | 700 | 0 | 650 | 1400 | 200 | 400 | 800 | 0 | |
 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — |
 | 5:01 | — | — | 5:02 | — | — | 5:04 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — |
Next 0-3 days weather summary:
A light covering of new snow, mostly falling on Sat night. Temperatures will be well below freezing (max -6°C on Fri afternoon, min -13°C on Sun night). Winds decreasing (fresh winds from the W on Sun morning, light winds from the WNW by Mon morning).
Next 4-6 days weather summary:
Mostly dry. Temperatures will be below freezing (max -1°C on Tue afternoon, min -11°C on Wed night). Wind will be generally light.
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Latest snow reports near Koumi Riekkusu Ski Valley:
Koumi Riekkusu Ski Valley Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | 3 cm |
| Last snowfall: | 21 Jan 2026 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Nagano are reporting: powder (3) / good piste (3)
Snow History
Week 4 of January has on average:
0.6 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.9 | Powder days Fresh snow, limited sun, any wind. |
2.7 | Bluebird days Average snow, mostly sunny, light wind. |
Koumi Riekkusu Ski Valley Forecast Snowfall
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Other resorts in Japan - Nagano are reporting: powder (3) / good piste (3)
The above table gives the weather forecast for Koumi Riekkusu Ski Valley at the specific elevation of 1590 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Koumi Riekkusu Ski Valley. 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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