霧雨で岩場は湿潤 スリップに注意

At 7:30 AM, the summit of Mt. Tsukuba is cloudy with a temperature of 15.2°C, feeling like 15.8°C. The base reports 19.1°C, indicating a significant 4°C difference. Daytime temperatures are expected to hover around 15°C, making it a cool summer day for this lowest-elevation Hyakumeizan in the Kanto Plain. High humidity at 92% and a possibility of light rain (0.5mm) around noon suggest trails will be wet to muddy.

Under these conditions, there is an increased risk of slipping on the rocky sections, particularly along the Miyukigahara Course and Shirakumobashi Course, which feature distinctive odd-shaped rocks. Wet rocks are especially treacherous, so extreme caution is advised for foot placement. Maintain a slow pace and move deliberately. Waterproof hiking boots with good grip are recommended.

For layering, a quick-drying base layer, a light fleece or long-sleeved shirt as a mid-layer, and a waterproof-breathable rain jacket as an outer layer are essential. The high humidity and potential for light rain can lead to rapid heat loss, so carry your rain gear at all times and wear it promptly. While winds are light, with gusts up to 8.7m/s at most, the risk of hypothermia due to wetness and high humidity remains. The afternoon will see a transition to partly cloudy skies, with temperatures remaining around 15°C into the evening. For any activity extending past sunset, prepare for cooler conditions and ensure adequate insulation.