At 4 p.m. at the Hong Kong Observatory : Air temperature : 21 degrees Celsius Relative Humidity : 67 per cent During the past hour the mean UV Index recorded at King's Park : 2 Intensity of UV radiation : low The air temperatures at other places were: Hong Kong Observatory21 degrees ; King's Park20 degrees ; Wong Chuk Hang21 degrees ; Ta Kwu Ling23 degrees ; Lau Fau Shan20 degrees ; Tai Po20 degrees ; Sha Tin22 degrees ; Tuen Mun20 degrees ; Tseung Kwan O20 degrees ; Sai Kung19 degrees ; Chek Lap Kok22 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 City22 degrees ; Happy Valley21 degrees ; Wong Tai Sin21 degrees ; Stanley20 degrees ; Kwun Tong19 degrees ; Sham Shui Po22 degrees ; Kai Tak Runway Park19 degrees ; Yuen Long Park24 degrees ; Tai Mei Tuk22 degrees . [air temperatures at other places]