夏のニセコ 霧雨で足元滑りやすい

The Niseko Hirafu summit is cloudy with a temperature of 8.7°C, feeling like 7.2°C. There is a 6°C difference compared to the base, making it chilly near the summit. Light drizzle is forecast to continue intermittently throughout the day, with temperatures hovering around 10°C. Although winds are generally light, the combination of moisture and cooler temperatures can significantly increase the risk of hypothermia, especially during stops.

Ground conditions will be wet overall due to the persistent drizzle. Particularly in tree run areas and gully terrain, conditions will become muddy, with exposed roots and rocks posing a significant slip hazard. The Hirafu ski slopes, which are used as hiking trails in summer, will also be slippery when wet, so exercise extreme caution with your footing. While visibility is currently good at over 12km, continuous drizzle may lead to gas formation on ridge lines and near the summit, potentially reducing visibility to below safe levels.

Full waterproof and breathable rain gear (jacket and pants) is essential. Choose a quick-drying base layer and layer with a thin fleece for effective temperature regulation. Wear waterproof hiking boots and exercise extreme caution with your footing, maintaining a deliberate and cautious pace to mitigate the risk of slips and falls. Crampons or microspikes are not necessary. Light drizzle is expected to continue into the evening, with temperatures dropping to around 5°C. Do not neglect your protection against wetness and cold until your activity concludes. While no significant alerts were detected by the automated risk assessment, mountain conditions are constantly changing and demand vigilance. Continuously monitor visibility and temperature trends, and plan your ascent or descent with careful consideration of these evolving conditions.