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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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Sun Valley at 1744 m 高度
Snow-Forecast.comによる発表： 4 pm (現地時間) / 18 Dec 2025
Now
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | ||||||||||||
after- noon | night | morn- ing | after- noon | night | morn- ing | after- noon | night | morn- ing | after- noon | night | morn- ing | after- noon | night | morn- ing | after- noon | night | |
 |  | |  |  |  | |  | | | | |  | |  | |  | |
小雪 | 並雨 | 小雪 | 豪雨 | にわか雪 | 晴れる | 晴れる | 小雪 | 小雪 | 小雪 | 小雪 | 小雪 | 一部曇り | 小雪 | 並雨 | 並雨 | 豪雨 | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
4 | — | 2 | — | — | — | — | 1 | 3 | — | 5 | — | — | 3 | — | — | — | |
— | 9 | 5 | 11 | — | — | — | — | — | 3 | — | — | — | 1 | 7 | 10 | 13 | |
max °C | -3 | 3 | 2 | 3 | -4 | -5 | -3 | -1 | 1 | 2 | 0 | 1 | 1 | 2 | 2 | 3 | 3 |
min °C | -3 | 1 | 1 | 2 | -14 | -14 | -10 | -10 | -1 | 0 | -1 | -2 | -3 | -1 | 2 | 3 | 2 |
-7 | -3 | -3 | -3 | -19 | -19 | -10 | -10 | -1 | -2 | -3 | -2 | -3 | -3 | 2 | 0 | -1 | |
96 | 95 | 98 | 89 | 71 | 58 | 71 | 95 | 96 | 98 | 98 | 90 | 90 | 98 | 99 | 99 | 96 | |
1500 | 2200 | 2150 | 2250 | 0 | 1050 | 550 | 1550 | 2050 | 2000 | 1900 | 2000 | 1450 | 2100 | 2300 | 2450 | 2250 | |
— | — | 8:06 | — | — | 8:06 | — | — | 8:07 | — | — | 8:07 | — | — | 8:07 | — | — | |
5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:02 | — | — | 5:02 | — | |
翌 0-3 日の天気概要：
おもに降雪による新雪の少量の積雪 木曜日の午後に 豪雨に押し流される (合計 25.0mm) 金曜日の午後に. 凍結融解の条件 (最大 3°C 木曜日の夜に, 最小 -14°C 金曜日の夜に). 風は通常微風.
翌 4-6 日の天気概要：
おもに降雪による新雪の少量の積雪 月曜日の夜に 豪雨に押し流される (合計 36.0mm) 火曜日の午後に. 凍結融解の条件 (最大 3°C 火曜日の午後に, 最小 -3°C 月曜日の午後に). 風は通常微風.
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最新の雪レポート Sun Valley:
Sun Valley の雪の状態
| 雪上部の深さ | 94 cm |
|---|---|
| 雪下部の深さ | 91 cm |
| 新雪の深さ | 5 cm |
| 最後の降雪 | 17 Dec 2025 |
USA - Idahoの他のリゾートの報告: 粉雪 (0) / 状態のよいゲレンデ (0)
雪の履歴
December月3 週の平均：
0.2 | ブルバードパウダーの日 新雪、おおむね晴れ、微風 |
|---|---|
1.5 | パウダーの日 新雪、時々晴れ、風あり |
0.8 | ブルーバードの日 平均的な雪、おおむね晴れ、微風 |
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新しい写真をアップロード USA - Idahoの他のリゾートの報告: 粉雪 (0) / 状態のよいゲレンデ (0)
上記の表には Sun Valley の1744 m の特定高度における天気予報が表示されています。高度な気候モデルによって、 Sun Valley の山頂、中腹、麓にあるスキーステーションの雪予報を提供することができます。その他の高度の天気予報にアクセスするには、テーブルの上のタブナビゲーションをお使いください。より広範囲の天気予報には、 United States の天気図をご覧ください。
ここをクリックし凍結高度や我々の気温の予測の仕方についてさらにご覧ください。
Sun Valleyのビジターによるレビュー
全体 4.5 基づいた 9 投票 および 9 レビュー
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- AustraliaのMichael Wilkoが記述:
Sun Valley is a riders mountain with 3,300 ft of vertical that you can ski every run. The big mountains like, Whistler, Jackson, Snowbird etc have lots of steeper runs that are broken up with a traverse along cat tracks to get to the next run. Sun Valley gets different weather systems to the Rockys but as most weather comes across deserts to get there, it can be as dry as the best. With no major mountains to block the weather systems, Sun Valley doesn't get as much snow as would like, but this is made up for by one of the best man made snow facilities anywhere in the world. Many a time have I driven from New Mexico to British Columbia looking for snow only to find top to bottom skiing in Sun Valley on man made snow with always perfectly groomed corduroy runs. If you are a wimp like me that doesn't enjoy skiing in temps below 20 degrees zero, enjoy the climate of one of Nth Americas finest. My tip for the serious snow rider is Dec / Jan Niseko Japan, Feb / March Sun Valley, Idaho.
Sun Valleyのビジターによるレビュー
AustraliaのMichael Wilkoが記述:
Sun Valley is a riders mountain with 3,300 ft of vertical that you can ski every run. The big mountains like, Whistler, Jackson, Snowbird etc have lots of steeper runs that are broken up with a traverse along cat tracks to get to the next run. Sun Valley gets different weather systems to the Rockys but as most weather comes across deserts to get there, it can be as dry as the best. With no major mountains to block the weather systems, Sun Valley doesn't get as much snow as would like, but this is made up for by one of the best man made snow facilities anywhere in the world. Many a time have I driven from New Mexico to British Columbia looking for snow only to find top to bottom skiing in Sun Valley on man made snow with always perfectly groomed corduroy runs. If you are a wimp like me that doesn't enjoy skiing in temps below 20 degrees zero, enjoy the climate of one of Nth Americas finest. My tip for the serious snow rider is Dec / Jan Niseko Japan, Feb / March Sun Valley, Idaho.
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