快晴が続き見晴らし良好。山頂付近は脆い火山礫に注意

Mount Rishiri is experiencing clear skies today. The summit temperature is 4.2 degrees Celsius, feeling like 0.6 degrees Celsius, but it is expected to rise to around 8 degrees Celsius during the day, with a perceived temperature of approximately 5 degrees Celsius. Winds are moderate, with gusts up to about 9 m/s, posing no significant hindrance to movement.

The ground is dry with no snow cover. However, the loose volcanic gravel above the 9th station, characteristic of Rishiri Mountain's upper slopes, can be particularly slippery when dry. When ascending via routes like the Oshidomari Course or Kutugata Course towards the summit, move cautiously and pay close attention to unstable rocks underfoot. As an isolated peak rising from sea level with an elevation gain of 1500 meters, requiring a long approach, a climbing plan that accounts for physical exertion is crucial.

While the risk of hypothermia is low during daytime activities, the perceived temperature drops during breaks or in windy areas. Therefore, carrying spare warm clothing is essential. A base layer, a mid-layer (fleece or light down), and a windproof and waterproof outer shell are mandatory. As temperatures will drop close to 0 degrees Celsius after sunset, strict cold weather precautions are necessary if your activity extends into the night.