穏やかな日中。夕方以降は急激な冷え込みに警戒

This morning at Tomamu summit, conditions are mostly clear with a mild 8.2 degrees Celsius and light winds, making for a gentle start to the day. Although it will become partly cloudy later, temperatures are expected to rise to 14.4 degrees Celsius around noon, with a comfortable feel of approximately 13 degrees Celsius. The temperature difference between the summit and the base remains around 3.8 degrees Celsius, making gondola access pleasant. However, temperatures will drop sharply in the evening. A significant temperature decrease of 11 degrees Celsius is forecast during the period, with the summit reaching as low as 0.5 degrees Celsius overnight into early morning. If you experience unexpected delays or continue activities after sunset, the wind chill could bring the effective temperature below freezing, increasing the risk of frostbite, a specific concern in the Tomamu area due to its often extremely cold environment. Carry an extra insulating layer from the start of your journey.

Ground conditions are generally dry, with no snow cover or precipitation. Muddy sections will be limited, but caution is advised in shaded, damp areas. While the risk of strong winds or thunderstorms is low, a drastic shift from mild daytime weather to a sharp evening chill demands strict vigilance. For daytime activities, wear a quick-drying base layer, a fleece mid-layer, and carry a windproof and waterproof outer shell for breaks or changing weather. If planning activities into the evening, be sure to pack heavier insulation, such as a thick down jacket. Make early decisions to turn back if conditions deteriorate.