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Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 14/Dec/2018
HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:

Hong Kong Observatory
Maximum Air Temperature                     18.1 C
Minimum Air Temperature                     13.5 C
Grass Minimum Temperature                   13.6 C
Relative Humidity                        59 - 75 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2152.3 mm
Against an average of                     2381.4 mm

Other Stations                Min                  Max
King's Park                  12.7 C               17.6 C
Wong Chuk Hang               13.7 C               18.7 C
Ta Kwu Ling                  10.5 C               16.6 C
Lau Fau Shan                 10.7 C               16.0 C
Tai Po                       10.6 C               16.3 C
Sha Tin                      11.7 C               17.3 C
Tuen Mun                     11.5 C               16.4 C
Tseung Kwan O                12.7 C               18.4 C
Sai Kung                     12.4 C               16.8 C
Cheung Chau                  12.3 C               18.8 C
Chek Lap Kok                 11.8 C               16.6 C
Tsing Yi                     13.4 C               17.9 C
Shek Kong                    10.8 C               17.0 C
Tsuen Wan Ho Koon            10.2 C               16.1 C
Tsuen Wan Shing Mun Valley   12.1 C               18.2 C
Hong Kong Park               13.8 C               18.3 C
Shau Kei Wan                 13.1 C               18.9 C
Kowloon City                 12.1 C               17.7 C
Happy Valley                 14.0 C               18.8 C
Wong Tai Sin                 12.3 C               18.6 C
Stanley                      14.3 C               18.8 C
Kwun Tong                    13.0 C               18.7 C
Sham Shui Po                 12.4 C               19.5 C
Kai Tak Runway Park          13.2 C               18.5 C
Yuen Long Park               10.7 C               17.5 C
Tai Mei Tuk               12.0 C               18.5 C

Duration of sunshine (King's Park):              2.6 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 5.

Yesterday's (13 Dec 2018) 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
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                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

  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.
Climatological Information for 13 Dec
Last revision date: <14 Dec 2018>