Bulletin issued at 00:15 HKT 19/May/2024
HKO Readings & Radiation level Yesterday's Weather and Radiation Level: ------------------------------------------------------ Hong Kong Observatory Maximum Air Temperature 28.6 C Minimum Air Temperature 25.1 C Grass Minimum Temperature 23.8 C Relative Humidity 61 - 82 Percent Rainfall trace Total rainfall since 1st January 427.7 mm Against an average of 447.5 mm Other Stations Min Max King's Park 24.2 C 28.6 C Wong Chuk Hang 24.8 C 28.5 C Ta Kwu Ling 23.3 C 29.5 C Lau Fau Shan 23.5 C 30.9 C Tai Po 23.7 C 28.9 C Sha Tin 24.0 C 28.7 C Tuen Mun 24.0 C 29.5 C Tseung Kwan O 23.3 C 27.9 C Sai Kung 24.3 C 28.1 C Cheung Chau 23.5 C 28.3 C Chek Lap Kok 25.6 C 30.1 C Tsing Yi 25.0 C 29.7 C Shek Kong 23.7 C 29.8 C Tsuen Wan Ho Koon 22.6 C 27.7 C Tsuen Wan Shing Mun Valley 23.6 C 29.4 C Hong Kong Park 24.5 C 27.6 C Shau Kei Wan 24.1 C 26.8 C Kowloon City 24.2 C 29.8 C Happy Valley 25.1 C 29.3 C Wong Tai Sin 24.6 C 28.7 C Stanley 24.5 C 28.4 C Kwun Tong 23.9 C 27.0 C Sham Shui Po 24.7 C 30.2 C Kai Tak Runway Park 25.0 C 28.7 C Yuen Long Park 24.2 C 30.3 C Tai Mei Tuk 23.7 C 29.2 C Duration of sunshine (King's Park): 3.1 H The mean UV index recorded at King's Park yesterday was 3, the UV intensity was MODERATE. The maximum UV index for yesterday was 8. Sea Surface Temperature (Waglan Island): 25.4 C Yesterday's (18 May 2024) average ambient gamma radiation dose rate taken outdoors in Hong Kong ranged from 0.09 to 0.15 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 0.10 Tap Mun 0.09 Kat O 0.10 Yuen Ng Fan 0.11 Tai Mei Tuk 0.12 Sha Tau Kok 0.10 Kwun Tong 0.13 Sai Wan Ho 0.09 King's Park 0.15 Tsim Bei Tsui 0.13 Cape D'Aguilar 0.12 Chek Lap Kok 0.15 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.Yesterday's Radiation Level