夏空広がる谷川岳。稜線は快適な歩行が期待される。

As of 7:15 AM, the summit of Tanigawadake is mostly clear with a temperature of 16.4 degrees Celsius, feeling like 17.4 degrees Celsius. The morning is calm with light winds at 0.4 m/s and excellent visibility beyond 20 km. There is a 7.7-degree Celsius temperature difference compared to the base. Clear skies are expected throughout the day, with temperatures rising to 21.5 degrees Celsius by noon and 22.5 degrees Celsius by 3 PM, making it comfortably warm for outdoor activities. Winds will remain light all day, promising a pleasant ascent via the Tenjin Ridge.

Ground conditions are dry due to no precipitation or snow cover, with many rock sections exposed. Exercise caution against falls and ensure stable footing. For summer climbing, in addition to a base layer, a thin mid-layer and a windproof, waterproof outer shell are essential. Although it may feel warm during activity, body temperature can drop during breaks on the ridge or in shaded areas, so frequent layering adjustments are crucial. Crampons and chain spikes are not required. However, always carry rain gear to prepare for sudden weather changes, a common characteristic of Tanigawadake.

While the risk of thunderstorms is low, a partly cloudy forecast for the afternoon necessitates vigilance for sudden weather shifts, a specific risk on Tanigawadake. Maximum wind gusts are expected to be around 10.5 m/s, which should not impede movement. The risk of hypothermia is low due to high daytime temperatures. Today is suitable for climbing, but access to areas like Ichinokurasawa and the East Face rock walls requires cautious judgment even for experienced climbers. After 6 PM, the weather will transition from partly cloudy to cloudy, with a 55% chance of precipitation by 9 PM, so plan to complete your descent during daylight hours.