At 3 p.m. at the Hong Kong Observatory : Air temperature : 21 degrees Celsius Relative Humidity : 63 per cent During the past hour the mean UV Index recorded at King's Park : 4 Intensity of UV radiation : moderate The air temperatures at other places were: Hong Kong Observatory21 degrees ; King's Park21 degrees ; Wong Chuk Hang21 degrees ; Ta Kwu Ling24 degrees ; Lau Fau Shan21 degrees ; Tai Po21 degrees ; Sha Tin22 degrees ; Tuen Mun21 degrees ; Tseung Kwan O20 degrees ; Sai Kung19 degrees ; Chek Lap Kok21 degrees ; Tsing Yi23 degrees ; Shek Kong24 degrees ; Tsuen Wan Ho Koon23 degrees ; Tsuen Wan Shing Mun Valley23 degrees ; Hong Kong Park21 degrees ; Shau Kei Wan19 degrees ; Kowloon City23 degrees ; Happy Valley21 degrees ; Wong Tai Sin21 degrees ; Stanley20 degrees ; Kwun Tong20 degrees ; Sham Shui Po22 degrees ; Kai Tak Runway Park20 degrees ; Yuen Long Park25 degrees ; Tai Mei Tuk24 degrees . [air temperatures at other places]