霧雨から晴天へ移行。高標高では防寒対策を徹底

Current summit conditions at 3040.85m report light drizzle with a perceived temperature of 0.1°C, a stark contrast to the clear skies and 13.6°C at the base. While light drizzle is expected until 9 AM, it is forecast to clear by late morning, transitioning to mostly clear skies through the afternoon.

Daytime temperatures will rise to around 5°C, but winds ranging from 1.8m/s to 2.3m/s with gusts up to 13.6m/s are predicted, maintaining a perceived temperature near 0°C. Hikers should be prepared for cold, exposed conditions, particularly on the white volcanic scree slopes above the treeline near Kengamine peak and the crater lakes, where wind effects are more pronounced. Essential layering includes a wicking base, a fleece or light down mid-layer, and a windproof/waterproof hardshell. Gloves and a warm hat are also crucial.

Ground conditions are wet initially due to trace precipitation but will gradually dry out with clear skies and wind. There is no snow or ice, making crampons unnecessary; exposed rock is the primary surface. While strong gusts up to 13.6m/s are expected, they are not severe enough to warrant canceling outdoor activities. However, the persistent low perceived temperature poses a risk of hypothermia; regular hydration, nutrition, and staying dry are vital. Lightning risk is low. As an active volcano, carrying a helmet is recommended, and awareness of volcanic gas is always prudent. Light drizzle may return in the evening around 6 PM, with temperatures dropping to near 0.5°C overnight. Plan your descent accordingly, bringing a headlamp and extra insulation if your activity extends into the evening.