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Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 24/Jun/2019
HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:

Hong Kong Observatory
Maximum Air Temperature                     32.2 C
Minimum Air Temperature                     29.1 C
Grass Minimum Temperature                   27.8 C
Relative Humidity                        74 - 87 Percent
Rainfall                                     3.2 mm 
Total rainfall since 1st January          1016.9 mm
Against an average of                      985.8 mm

Other Stations                Min                  Max
King's Park                  28.3 C               32.0 C
Wong Chuk Hang               28.8 C               31.1 C
Ta Kwu Ling                  27.5 C               32.3 C
Lau Fau Shan                 28.6 C               31.1 C
Tai Po                       28.1 C               31.5 C
Sha Tin                      29.2 C               31.8 C
Tuen Mun                     28.8 C               31.3 C
Tseung Kwan O                28.0 C               33.2 C
Sai Kung                     28.7 C               33.4 C
Cheung Chau                  27.4 C               33.0 C
Chek Lap Kok                 29.4 C               32.9 C
Tsing Yi                     28.4 C               31.6 C
Shek Kong                    28.5 C               32.8 C
Tsuen Wan Ho Koon            27.5 C               30.3 C
Tsuen Wan Shing Mun Valley   28.5 C               31.6 C
Hong Kong Park               28.7 C               31.4 C
Shau Kei Wan                 28.5 C               32.3 C
Kowloon City                 27.7 C               31.8 C
Happy Valley                 29.2 C               32.1 C
Wong Tai Sin                 28.4 C               32.6 C
Stanley                      28.8 C               31.2 C
Kwun Tong                    28.1 C               31.7 C
Sham Shui Po                 28.4 C               32.1 C
Kai Tak Runway Park          28.4 C               32.6 C
Yuen Long Park               29.1 C               32.5 C
Tai Mei Tuk               28.3 C               32.3 C

Duration of sunshine (King's Park):              3.9 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 8.

Yesterday's (23 Jun 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
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 23 Jun
Last revision date: <24 Jun 2019>