穏やかな夏山日和。午後は湿度上昇、岩稜帯の足元注意

Current conditions at Tateyama O-yama summit are mostly clear with a temperature of 8.4°C, feeling like 6.3°C. The temperature difference from the base is approximately 4°C. Temperatures are expected to rise throughout the day, reaching 13.9°C by 3 PM, with a feels-like temperature of 12.8°C. Winds will remain light and calm all day, but humidity is forecast to increase in the afternoon, along with a rising chance of precipitation, though no significant rainfall is expected.

Today's ascent offers relatively stable weather, but it is crucial to remember this is a 3000-meter-class mountain. On the main route from Murodo via Ichinokoshi to O-yama summit, constant vigilance for rockfall near Ichinokoshi is necessary. Especially in the afternoon, as humidity increases, the rocky terrain may become damp, requiring careful footing. With feels-like temperatures ranging from 6°C to 13°C throughout the day, a quick-drying base layer, a light fleece mid-layer, and a waterproof-breathable shell are essential. For breaks or exposed areas, carrying a light down or synthetic insulation layer is advisable.

While no significant alerts have been detected, continuously monitor visibility and temperature changes. Although the rising afternoon precipitation probability does not indicate actual rainfall, always carry rain gear for unexpected weather shifts. The risk of lightning is low, but be prepared to seek shelter immediately if thunder is heard.