Weather Report > Yesterday's Weather and Radiation Level
Bulletin updated at 00:15 HKT 19/ Mar /2018

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 24.1°C
Minimum Air Temperature: 19.2°C
Grass Minimum Temperature: 18.3°C
Relative Humidity: 75 - 91%
Rainfall: Trace

Total rainfall since 1st January: 89.4 mm
Against an average of 113.9 mm

Other Stations Min Max
King's Park 18.6°C 23.9°C
Ta Kwu Ling 18.7°C 25.2°C
Wong Chuk Hang 19.0°C 25.1°C
Lau Fau Shan 17.9°C 26.2°C
Tai Po 19.1°C 22.3°C
Sha Tin 19.0°C 24.9°C
Tuen Mun 19.1°C 24.4°C
Tseung Kwan O 18.1°C 22.1°C
Sai Kung 18.7°C 22.0°C
Cheung Chau 18.4°C 23.5°C
Chek Lap Kok 19.7°C 27.3°C
Tsing Yi 19.9°C 25.3°C
Shek Kong 19.7°C 26.9°C
Tsuen Wan Ho Koon 18.6°C 25.0°C
Tsuen Wan Shing Mun Valley 19.4°C 25.7°C
Hong Kong Park 19.0°C 23.5°C
Shau Kei Wan 18.1°C 22.0°C
Kowloon City 18.7°C 24.5°C
Happy Valley 19.1°C 25.5°C
Wong Tai Sin 18.9°C 24.9°C
Stanley 18.5°C 23.1°C
Kwun Tong 18.2°C 23.6°C
Sham Shui Po 19.5°C 25.3°C
Kai Tak Runway Park 19.0°C 22.3°C
Yuen Long Park 18.9°C 27.4°C
Duration of Sunshine (King's Park): 4.9 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 6.

Sea surface temperature (Waglan Island): 19.5°C

Yesterday's (18 Mar) 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
King's Park 0.14
Ping Chau 0.08
Tap Mun 0.09
Kat O 0.10
Yuen Ng Fan 0.12
Tai Mei Tuk 0.12
Sha Tau Kok 0.10
Kwun Tong 0.12
Sai Wan Ho 0.09
Tsim Bei Tsui 0.13
Cape D'Aguilar0.13
Chek Lap Kok0.14


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.
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