御嶽山 剣ヶ峰へ視界良好 薄曇り穏やかな一日

Mt. Ontake's summit conditions at 7:15 AM are partly cloudy with a temperature of 9.7°C, feeling like 7.7°C. The temperature difference from the base is a significant 9.4°C, necessitating robust cold weather gear at higher elevations. The forecast for the day indicates mostly cloudy skies with a high of 13.5°C. However, with winds up to 1.63 m/s and gusts reaching 8.8 m/s, the perceived temperature will remain cool. The exposed white volcanic scree slopes above the treeline will be dry due to no precipitation, making the ascent towards Kengamine clear and manageable.

For layering, a quick-drying base layer, a mid-layer such as fleece or synthetic insulation, and a windproof shell as an outer layer are essential. Additionally, carry an extra insulating layer like a lightweight down jacket for breaks or when winds pick up. As Mt. Ontake is an active volcano, and learning from the 2014 eruption disaster, carrying a helmet is strongly recommended as a precaution against unforeseen events.

The risk of thunderstorms is negligible with precipitation probability remaining very low. Strong winds are not a major concern, with gusts peaking at 9.6 m/s, which should not significantly impede movement. However, given the consistently cool perceived temperatures at high altitudes, vigilance against hypothermia is necessary. Temperatures will drop to 7.6°C overnight, so plan to complete all activities during daylight hours and descend early.