午前中は穏やか。午後は霧雨と濡れた岩場に注意

Mt. Tateyama's summit is currently mostly clear, with a temperature of 11.1°C and a feels-like temperature of 10.2°C, marking a relatively calm morning. Winds are light, and visibility is 2km. Murodo at the base is also mostly clear with 14.8°C, indicating stable conditions. The clear weather is expected to continue through the morning, with temperatures rising to a peak of 14.9°C around noon. This period offers favorable conditions for ascent, and the route from Murodo to Ichinokoshi and the summit of Mt. Oyama should remain dry.

However, the weather will change in the afternoon. Light drizzle is forecast to begin around 3 PM and persist into the evening. Although the precipitation is minimal at 0.1mm, wet rock faces in this alpine area become slippery, increasing the risk of falling rocks, especially from Ichinokoshi. Getting wet will further lower the feels-like temperature, elevating the risk of hypothermia in this 3000m-class mountain environment. Always carry waterproof and breathable rain gear and insulating layers, and wear them promptly to stay dry.

While the risk of lightning and strong winds is low, poor visibility due to drizzle and slippery rock faces demand extreme caution. During afternoon descents, potential congestion can also lead to chilling. Plan your climb with ample time, avoiding any rushed or overly ambitious actions. Clear skies are expected to return overnight, but temperatures will drop to around 9°C.