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

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 31.9 C
Minimum Air Temperature: 27.0 C
Grass Minimum Temperature: 25.9 C
Relative Humidity: 63 - 90 percent
Rainfall: 0 mm

Total Rainfall since 1st January: 1856.9 mm
Against an average of 2149.7 mm

Other Stations
Min
Max
King's Park
26.5 C
31.6 C
Wong Chuk Hang
25.3 C
31.2 C
Ta Kwu Ling
25.3 C
33.6 C
Lau Fau Shan
25.8 C
30.7 C
Sha Tin
25.7 C
33.4 C
Tuen Mun
26.0 C
32.5 C
Tseung Kwan O
24.7 C
32.9 C
Sai Kung
25.9 C
32.5 C
Cheung Chau
25.0 C
33.3 C
Chek Lap Kok
26.9 C
32.5 C
Tsing Yi
25.4 C
31.5 C
Shek Kong
24.4 C
34.8 C
Tsuen Wan Ho Koon
24.2 C
31.0 C
Tsuen Wan Shing Mun Valley
24.9 C
32.6 C
Hong Kong Park
25.8 C
32.4 C
Shau Kei Wan
26.1 C
32.2 C
Kowloon City
26.1 C
33.4 C
Happy Valley
25.9 C
33.1 C
Wong Tai Sin
26.2 C
33.0 C
Stanley
25.7 C
30.9 C
Kwun Tong
26.5 C
32.6 C
Sham Shui Po
26.5 C
32.4 C

Duration of Sunshine (King's Park): 8.4 H
The mean UV Index recorded at King's Park yesterday was 4,
the UV intensity was Moderate
The maximum UV Index for yesterday was 9.
Yesterday's (20 Sep) 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 (microsievert/hour)
King's Park
0.14
Ping Chau
0.08
Tap Mun
0.08
Kat O
0.10
Yuen Ng Fan
0.11
Tai Mei Tuk
0.11
Sha Tau Kok
0.10
Kwun Tong
0.12
Sai Wan Ho
0.08
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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