Bulletin issued at 00:15 HKT 26/Apr/2024
HKO Readings & Radiation level Yesterday's Weather and Radiation Level: ------------------------------------------------------ Hong Kong Observatory Maximum Air Temperature 28.5 C Minimum Air Temperature 24.4 C Grass Minimum Temperature 23.7 C Relative Humidity 70 - 94 Percent Rainfall 5.7 mm Total rainfall since 1st January 229.8 mm Against an average of 274.7 mm Other Stations Min Max King's Park 23.6 C 28.2 C Wong Chuk Hang 25.8 C 28.1 C Ta Kwu Ling 23.4 C 29.4 C Lau Fau Shan 24.6 C 29.4 C Tai Po 23.9 C 29.4 C Sha Tin 24.6 C 29.2 C Tuen Mun 25.5 C 28.2 C Tseung Kwan O 23.0 C 29.6 C Sai Kung 23.6 C 29.8 C Cheung Chau 24.0 C 27.2 C Chek Lap Kok 26.2 C 29.8 C Tsing Yi 24.9 C 27.3 C Shek Kong 24.7 C 29.5 C Tsuen Wan Ho Koon 23.9 C 26.3 C Tsuen Wan Shing Mun Valley 24.4 C 27.2 C Hong Kong Park 24.3 C 27.8 C Shau Kei Wan 22.9 C 28.9 C Kowloon City 23.3 C 29.1 C Happy Valley 25.5 C 29.6 C Wong Tai Sin 24.0 C 29.5 C Stanley 24.9 C 28.0 C Kwun Tong 23.1 C 29.4 C Sham Shui Po 24.7 C 28.0 C Kai Tak Runway Park 23.8 C 29.9 C Yuen Long Park 25.8 C 30.2 C Tai Mei Tuk 22.6 C 27.8 C Duration of sunshine (King's Park): 1.7 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 7. Sea Surface Temperature (Waglan Island): 25.0 C Yesterday's (25 Apr 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 0.09 Tap Mun 0.09 Kat O 0.09 Yuen Ng Fan 0.11 Tai Mei Tuk 0.11 Sha Tau Kok 0.10 Kwun Tong 0.12 Sai Wan Ho 0.09 King's Park 0.14 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