利尻山 稜線は風強く体感低温。9合目以降の火山礫に注意。

Today, Mount Rishiri will experience strengthening winds throughout the day, maintaining low perceived temperatures. The current summit conditions are cloudy with an air temperature of 6.4℃ and a perceived temperature of 2.3℃, with wind speeds of 5.1m/s. By 9 AM, the air temperature is expected to reach 7.6℃ with gusts up to 14.6m/s, and by noon, 9℃ with gusts up to 15.9m/s. The significant temperature difference of approximately 9.5℃ between the summit and base necessitates robust cold weather preparation.

From the 9th station to the summit, fragile volcanic scree is exposed. Despite no precipitation forecast, high humidity combined with strong winds will make the perceived temperature feel even colder. Especially on exposed ridges, such as the final section of the Oshidomari course, strong gusts increase the risk of losing balance. The perceived temperature will hover between 1℃ and 3℃ throughout the day, and body heat can be rapidly lost if stationary due to the chilling sea breeze.

Essential gear includes standard summer hiking equipment, along with waterproof and windproof shell layers, mid-layers like fleece or lightweight down, gloves, and a hat. While the risk of thunderstorms is low, extreme caution is advised against falls due to strong gusts and hypothermia. Continuously monitor your body temperature during activity, and take short breaks in sheltered areas. Winds will subside by night, but temperatures will drop to around 5℃.