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Bulletin updated at 00:15 HKT
21/ Nov /2018

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 24.0 C
Minimum Air Temperature: 22.0 C
Grass Minimum Temperature: 21.6 C
Relative Humidity: 74 - 87 percent
Rainfall: 0.1 mm

Total Rainfall since 1st January: 2087.7 mm
Against an average of 2361.0 mm

Other Stations
Min
Max
King's Park
21.6 C
24.0 C
Wong Chuk Hang
21.4 C
24.7 C
Ta Kwu Ling
19.4 C
26.5 C
Lau Fau Shan
19.9 C
29.6 C
Tai Po
20.2 C
23.0 C
Sha Tin
20.8 C
24.0 C
Tuen Mun
21.7 C
25.4 C
Tseung Kwan O
21.2 C
23.6 C
Sai Kung
21.8 C
23.4 C
Cheung Chau
21.6 C
25.0 C
Chek Lap Kok
22.2 C
26.4 C
Tsing Yi
22.3 C
25.5 C
Shek Kong
21.2 C
26.6 C
Tsuen Wan Ho Koon
20.7 C
25.3 C
Tsuen Wan Shing Mun Valley
21.6 C
25.6 C
Hong Kong Park
21.5 C
24.5 C
Shau Kei Wan
21.0 C
23.0 C
Kowloon City
21.4 C
25.3 C
Happy Valley
21.6 C
25.4 C
Wong Tai Sin
21.5 C
24.7 C
Stanley
21.2 C
23.5 C
Kwun Tong
21.0 C
23.9 C
Sham Shui Po
22.1 C
25.7 C

Duration of Sunshine (King's Park): 2.9 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 (20 Nov) 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
0.09
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
0.13
Sai Wan Ho
0.09
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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