霧雨で濡れる登山道。樹林帯内は視界不良に注意

As of 7 AM, the Rusutsu Resort Isola summit is cloudy with a temperature of 17.1℃ and a gentle wind of 0.25 m/s. The base area is 21℃, showing about a 4℃ difference from the summit. Throughout the day, temperatures will hover around 19℃. However, light drizzle is expected between noon and 3 PM, with a high probability of 92% to 100%. Although the total precipitation will be minimal, the ground will become wet. Particularly within the abundant tree-lined routes, where water dripping from trees will add to the moisture, muddy sections are likely to appear. Visibility near the Isola summit may also decrease in the afternoon, requiring caution.

The effective temperature at 990m is estimated to be around 17.4℃ at noon, even with a wind speed of 2.43 m/s. For layering during activity, a quick-drying base layer combined with a thin fleece or similar mid-layer is appropriate. Waterproof and breathable rainwear is essential for the afternoon drizzle. While you might feel warm during activity, carrying rain gear is crucial to prevent hypothermia during stops or when exposed to wind. The ground will be wet to muddy, so choose non-slip light hiking boots. Crampons or microspikes are not necessary.

There are no signs of thunderstorms today, and the maximum gust speed is around 7 m/s, indicating a low risk of strong winds. Temperatures are not expected to drop below 14℃, and with proper rainwear and layering, the risk of hypothermia is low. However, prolonged stops while wet should be avoided. After 6 PM, precipitation will cease, and the weather will improve to partly cloudy then cloudy. Temperatures will gradually drop, reaching around 14℃ by midnight. Day activities are feasible, but be vigilant about reduced visibility and slippery ground due to the afternoon drizzle.