Bulletin issued at 00:15 HKT 01/Jul/2022
HKO Readings & Radiation level Yesterday's Weather and Radiation Level: ------------------------------------------------------ Hong Kong Observatory Maximum Air Temperature 29.6 C Minimum Air Temperature 25.9 C Grass Minimum Temperature 25.3 C Relative Humidity 80 - 95 Percent Rainfall 64.9 mm Total rainfall since 1st January 1054.5 mm Against an average of 1082.5 mm Other Stations Min Max King's Park 25.1 C 28.7 C Wong Chuk Hang 25.8 C 30.0 C Ta Kwu Ling 25.0 C 29.4 C Lau Fau Shan 25.3 C 28.2 C Tai Po 25.3 C 29.4 C Sha Tin 25.4 C 30.7 C Tuen Mun 25.3 C 30.7 C Tseung Kwan O 25.7 C 29.3 C Sai Kung 25.5 C 29.5 C Cheung Chau 24.4 C 27.9 C Chek Lap Kok 26.0 C 30.8 C Tsing Yi 25.3 C 29.8 C Shek Kong 25.9 C 29.1 C Tsuen Wan Ho Koon 24.4 C 27.6 C Tsuen Wan Shing Mun Valley 24.9 C 28.6 C Hong Kong Park 25.2 C 29.1 C Shau Kei Wan 24.3 C 28.5 C Kowloon City 25.2 C 28.8 C Happy Valley 25.8 C 30.2 C Wong Tai Sin 25.7 C 29.3 C Stanley 25.3 C 29.9 C Kwun Tong 25.0 C 28.4 C Sham Shui Po 25.6 C 29.7 C Kai Tak Runway Park 25.7 C 29.3 C Yuen Long Park 26.0 C 29.3 C Tai Mei Tuk 26.0 C Duration of sunshine (King's Park): 0.3 H The mean UV index recorded at King's Park yesterday was 2, the UV intensity was LOW. The maximum UV index for yesterday was 5. Yesterday's (30 Jun 2022) average ambient gamma radiation dose rate taken outdoors in Hong Kong ranged from 0.08 to 0.14 microsievert per hour. These are within the normal range of fluctuation of the background radiation level in Hong Kong (See Note). The average dose rates measured at the radiation monitoring stations over various parts of the territory were as follows : Station Yesterday's average (microsievert/hour) Ping Chau 0.09 Tap Mun 0.08 Kat O 0.10 Yuen Ng Fan 0.11 Tai Mei Tuk 0.11 Sha Tau Kok 0.09 Kwun Tong 0.12 Sai Wan Ho 0.09 King's Park 0.13 Tsim Bei Tsui 0.12 Cape D'Aguilar 0.12 Chek Lap Kok 0.14 Note 1. From readings taken at various locations in Hong Kong in the past, the hourly mean ambient gamma radiation dose rate may vary between 0.06 and 0.3 microsievert per hour. (1 microsievert = 0.000001 sievert = 0.001 millisievert) 2. Temporal variations are generally caused by changes in meteorological conditions such as rainfall, wind and barometric pressure. 3. Spatial variations are generally caused by differences in the radioactive content of local rock and soil. 4. The data displayed is provisional. Only limited data validation has been carried out. 5. The range of relative humidity in the daily weather summary originates from the observer's reports of Hourly Readings of the day. This follows the long-term practice of collecting climatological data of the Hong Kong Observatory for over a century. It may differ from the relative humidity range derived from the 1-minute reports of the automatic weather station.