日中穏やかな登山日和。夕方以降は急な冷え込みに注意

Current conditions at Sapporo Teine summit are cloudy with a comfortable temperature of 19.2°C and negligible wind at 0.7m/s, indicating a calm morning. The base area registers 22°C, approximately 2.8°C warmer than the summit. Throughout the day, cloudy to partly cloudy skies are expected, with temperatures peaking around 22.4°C at noon. Wind speeds will remain light, with maximum gusts around 9.4m/s by 3 PM, posing minimal impact on outdoor activities.

Ground conditions are anticipated to be generally dry, as there is no snow cover and no precipitation is forecasted. However, in areas such as the steep slopes of the Highland Zone where soil is exposed, there might be some wet or muddy patches due to previous rainfall or humidity. Caution is advised on these steep sections to prevent falls, even in summer. Crampons or microspikes are not necessary, but sturdy trekking shoes with good grip are essential.

As highlighted by the automatic risk assessment, a significant temperature drop is expected from evening onwards. Temperatures are projected to fall by approximately 11°C, from 21.2°C at 3 PM to 9.3°C by 3 AM the following day. This rapid cooling increases the risk of hypothermia, especially during periods of inactivity or if clothing becomes damp from sweat. While short-sleeved shirts or light long-sleeved base layers are suitable for daytime activities, it is crucial to carry a fleece mid-layer and a waterproof, windproof outer shell to prepare for the sudden temperature change. For those planning nighttime activities, an additional insulating layer like a down jacket is strongly recommended. Thunderstorm risk is low, and wind speeds are not strong enough to impede movement, making daytime hiking appropriate. However, strict cold weather preparedness is essential for any evening or nighttime ventures.