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Bulletin updated at 00:15 HKT
16/ Jan /2019

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 21.1 C
Minimum Air Temperature: 17.0 C
Grass Minimum Temperature: 16.8 C
Relative Humidity: 75 - 96 percent
Rainfall: 4.0 mm

Total Rainfall since 1st January: 4.4 mm
Against an average of 10.7 mm

Other Stations
Min
Max
King's Park
16.4 C
21.8 C
Wong Chuk Hang
16.7 C
22.0 C
Ta Kwu Ling
17.0 C
22.3 C
Lau Fau Shan
16.5 C
21.0 C
Tai Po
16.6 C
21.0 C
Sha Tin
17.1 C
22.5 C
Tuen Mun
17.2 C
21.7 C
Tseung Kwan O
16.4 C
22.3 C
Sai Kung
17.1 C
21.8 C
Cheung Chau
16.4 C
21.6 C
Chek Lap Kok
17.5 C
21.5 C
Tsing Yi
17.2 C
22.4 C
Shek Kong
17.2 C
22.6 C
Tsuen Wan Ho Koon
16.4 C
21.3 C
Tsuen Wan Shing Mun Valley
17.1 C
22.5 C
Hong Kong Park
16.5 C
22.0 C
Shau Kei Wan
16.2 C
22.1 C
Kowloon City
16.4 C
22.7 C
Happy Valley
17.0 C
23.0 C
Wong Tai Sin
17.0 C
23.0 C
Stanley
16.5 C
21.1 C
Kwun Tong
16.3 C
22.9 C
Sham Shui Po
16.9 C
22.5 C

Duration of Sunshine (King's Park): 1.2 H
The mean UV Index recorded at King's Park yesterday was 1,
the UV intensity was Low
The maximum UV Index for yesterday was 4.
Yesterday's (15 Jan) 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)
King's Park
0.15
Ping Chau
0.10
Tap Mun
0.09
Kat O
0.11
Yuen Ng Fan
0.12
Tai Mei Tuk
0.12
Sha Tau Kok
0.11
Kwun Tong
0.13
Sai Wan Ho
0.10
Tsim Bei Tsui
0.13

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.
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