午後から雨と冷え込み。早めの行動と十分な防寒を

As of 7:45 AM, the Asahidake summit area is mostly clear with a temperature of 7.5°C and a feels-like temperature of 5.6°C. Winds are light, and visibility is excellent. There is a temperature difference of about 4.4°C between the summit and the base. The route from Asahidake Ropeway's Sugatami Station towards the summit still has residual snow patches of about 10cm. While no ice is present this morning, the snow is soft, and the boundaries with exposed rock sections can be slippery. Exercise caution around the fumarole areas, known as Jigokudani, where melting snow and mud can create hazardous conditions.

Weak drizzle is expected in the morning, but temperatures will rise to around 10°C until approximately noon, offering a relatively comfortable window for activity. However, rain will begin around 3 PM, with temperatures dropping to 7°C. A rapid temperature decrease of 6°C is forecasted over the period, significantly elevating the risk of hypothermia during your activity. Essential layering includes a moisture-wicking base, a warm mid-layer such as fleece plus a light down jacket for insulation, and a waterproof-breathable shell as an outer layer.

While the risk of lightning and strong winds is low, the afternoon rain will further reduce the feels-like temperature. Continuing activity while wet increases heat loss, so consider an early turnaround. Asahidake can experience low temperatures even in summer, making robust cold weather gear crucial.