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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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Riverside Hills at 428 m altitude
Issued by Snow-Forecast.com at: 11 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 | |
 |  |  |  |  |  |  | |  |  | | |  | | | | |
light rain | snow shwrs | light snow | snow shwrs | cloudy | some clouds | cloudy | some clouds | clear | clear | clear | some clouds | light snow | some clouds | some clouds | cloudy | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
— | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 9 | -4 | -10 | -9 | -5 | -1 | 5 | 1 | 1 | -6 | -3 | -1 | 2 | 6 | 8 | 6 |
min °C | 3 | -5 | -11 | -10 | -8 | -3 | 1 | 0 | -1 | -7 | -6 | -1 | 0 | 3 | 5 | 4 |
-4 | -14 | -23 | -21 | -8 | -10 | -5 | -6 | -8 | -13 | -9 | -6 | -7 | -3 | 2 | 1 | |
76 | 73 | 84 | 60 | 44 | 45 | 59 | 65 | 55 | 52 | 59 | 51 | 53 | 62 | 64 | 76 | |
2700 | 0 | 0 | 0 | 0 | 0 | 2950 | 500 | 550 | 0 | 0 | 0 | 1600 | 3200 | 3300 | 3300 | |
 | — | 7:46 | — | — | 7:47 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — |
 | — | — | 4:44 | — | — | 4:45 | — | — | 4:45 | — | — | 4:45 | — | — | 4:45 | — |
Next 0-3 days weather summary:
Light rain (total 3.0mm) at first, then becoming colder with a dusting of snow on Thu afternoon. Freeze-thaw conditions (max 9°C on Wed night, min -11°C on Thu afternoon). Winds decreasing (near gales from the SSW on Wed night, calm by Fri morning).
Next 4-6 days weather summary:
Mostly dry. Freeze-thaw conditions (max 8°C on Mon afternoon, min -7°C on Sat night). Winds increasing (light winds from the WNW on Sun morning, strong winds from the SSW by Sun night).
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Snow Radar
Latest snow reports near Riverside Hills:
Riverside Hills Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Dec 2025 |
| Snow Alerts | Create Alert |
Other resorts in USA - Iowa are reporting: powder (0) / good piste (0)
Snow History
Week 3 of December has on average:
0.3 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.4 | Powder days Fresh snow, limited sun, any wind. |
2.0 | Bluebird days Average snow, mostly sunny, light wind. |
Riverside Hills Forecast Snowfall
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Other resorts in USA - Iowa are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Riverside Hills at the specific elevation of 428 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Riverside Hills. 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 United States.
Click here to read further information on freezing levels and how we forecast our temperatures.
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