視程回復。稜線は風弱く歩きやすい

As of 7 AM, the summit of Mount Rishiri is cloudy with a perceived temperature of 7.6 degrees Celsius and visibility limited to 1.6 kilometers. However, the weather is expected to improve significantly throughout the day, becoming mostly sunny by noon and clear by 3 PM. Temperatures will rise to 12.9 degrees Celsius by noon and 13.3 degrees Celsius by 3 PM. Winds will remain mild, with gusts up to 12.1 m/s, suggesting a relatively comfortable ascent.

Ground conditions are generally dry due to no precipitation and no snow cover. However, given the high humidity and cloudy conditions this morning, some sections might be wet or have damp rocks. The clear weather later in the day should help these areas dry out.

Appropriate layering is essential for your hike. Wear a quick-drying long-sleeve base layer, a light fleece or thin down jacket as a mid-layer, and a windproof, waterproof shell jacket as an outer layer. Be prepared to adjust your layers as temperatures fluctuate throughout the day. Carry a warm hat and light gloves for breaks or colder periods. Essential gear includes full rain gear (jacket and pants), sufficient food and water, a headlamp, and a first-aid kit. Crampons or microspikes are not necessary.

The risk of lightning is extremely low, and strong winds are not anticipated. While the risk of hypothermia is low during daylight hours, be mindful of cooler temperatures during morning cloudy periods or extended breaks. Pay particular attention to the unstable volcanic scree terrain from the 9th station to the summit, even with improved visibility, to prevent rockfall or slips. Although clear skies will persist into the evening, clouds are forecast to return overnight, with temperatures dropping to around 9 degrees Celsius, so ensure adequate thermal protection if planning to be out after dark.