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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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Mt St Louis Moonstone at 320 m altitude
Issued by Snow-Forecast.com at: 12 pm (local time) / 17 Dec 2025
Now
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  | | |  | | | | | | |  | | | |
light snow | snow shwrs | some clouds | light rain | light rain | light snow | light snow | light snow | snow shwrs | light snow | light snow | light snow | light snow | light snow | light snow | cloudy | cloudy | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | 1 | 2 | — | — | 3 | 2 | 1 | 2 | — | — | — | — | |
— | — | — | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 2 | -1 | 2 | 5 | 6 | 6 | -2 | -5 | -9 | -3 | -2 | 0 | -5 | -5 | -10 | -10 | -9 | -9 |
min °C | 1 | -3 | -7 | 3 | 6 | 1 | -3 | -8 | -10 | -7 | -2 | -5 | -6 | -7 | -13 | -13 | -10 | -13 |
-6 | -8 | -10 | -3 | 1 | -4 | -11 | -17 | -13 | -13 | -9 | -14 | -15 | -15 | -18 | -20 | -13 | -20 | |
98 | 80 | 79 | 84 | 81 | 100 | 87 | 91 | 74 | 75 | 89 | 77 | 69 | 76 | 80 | 84 | 76 | 84 | |
600 | 150 | 0 | 2400 | 2450 | 1800 | 50 | 0 | 0 | 0 | 0 | 300 | 0 | 0 | 0 | 0 | 0 | 0 | |
 | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:52 | — | — | 7:52 | — | — |
 | — | 4:38 | — | — | 4:38 | — | — | 4:38 | — | — | 4:39 | — | — | 4:39 | — | — | 4:40 | — |
Next 0-3 days weather summary:
Light rain (total 8.0mm) at first, then becoming colder with a dusting of snow on Fri afternoon. Freeze-thaw conditions (max 6°C on Thu afternoon, min -10°C on Fri night). Winds decreasing (strong winds from the S on Thu night, calm by Fri night).
Next 4-6 days weather summary:
A light covering of new snow, mostly falling on Sat afternoon. Temperatures will be below freezing (max 0°C on Sat night, min -13°C on Sun night). Winds decreasing (strong winds from the WNW on Sun morning, calm by Mon afternoon).
Popular Mt St Louis Moonstone Pages
Snow Radar
Latest snow reports near Mt St Louis Moonstone:
Mt St Louis Moonstone Snow Conditions
| Top snow depth: | 79 cm |
|---|---|
| Bottom snow depth: | 51 cm |
| Fresh snowfall depth: | 10 cm |
| Last snowfall: | 15 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in Canada - Ontario are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.5 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.8 | Powder days Fresh snow, limited sun, any wind. |
1.3 | Bluebird days Average snow, mostly sunny, light wind. |
Mt St Louis Moonstone Forecast Snowfall
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Photos of Mt St Louis Moonstone
Ski at Mt St Louis by Roro
Ski at Mt St Louis by Roro
Ski at Mt St Louis by Roro
Upload new photo Other resorts in Canada - Ontario are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Mt St Louis Moonstone at the specific elevation of 320 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Mt St Louis Moonstone. 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 Canada.
Click here to read further information on freezing levels and how we forecast our temperatures.
Visitor Reviews of Mt St Louis Moonstone
Overall 2.3 Based on 2 votes and 6 reviews
- Snowsure
- Variety of pistes
- Vote
- Kim from Canada writes:
We have purchased the 5x5 pass for the last 12 years. Never ever have they notified us regarding the tier 1 purchase price. It is always sold out. Leaving us to, once again, pay the higher price. You would think being a loyal customer they would notify us when the sale starts. Also, getting far too crowded even on a work day. Bye bye Mount Saint Louis. Skiing somewhere else. You lost us.
Visitor Reviews of Mt St Louis Moonstone
Kim from Canada writes:
We have purchased the 5x5 pass for the last 12 years. Never ever have they notified us regarding the tier 1 purchase price. It is always sold out. Leaving us to, once again, pay the higher price. You would think being a loyal customer they would notify us when the sale starts. Also, getting far too crowded even on a work day. Bye bye Mount Saint Louis. Skiing somewhere else. You lost us.
Read 5 more reviews of Mt St Louis Moonstone or submit your own
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