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Daily Weather Summary and Radiation Level on 09/07/2016

HKO Readings & Radiation Level

Daily Weather Summary and Radiation Level on 09/07/2016:

Hong Kong Observatory
Maximum Air Temperature                     35.6 C
Minimum Air Temperature                     26.4 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        55 - 88 Percent
Rainfall                                    10.3 mm 
Total rainfall since 1st January          1317.2 mm
Against an average of                     1191.9 mm

Other Stations                Min                  Max
King's Park                  23.3 C               35.4 C
Wong Chuk Hang               26.1 C               34.6 C
Lau Fau Shan                 26.7 C               35.8 C
Tai Po                       25.3 C               36.5 C
Sha Tin                      26.5 C               37.2 C
Tuen Mun                     26.5 C               35.8 C
Tseung Kwan O                24.8 C               36.3 C
Cheung Chau                  25.1 C               33.6 C
Chek Lap Kok                 28.9 C               36.6 C
Tsing Yi                     25.7 C               35.9 C
Shek Kong                    26.1 C               37.3 C
Tsuen Wan Ho Koon            25.4 C               35.7 C
Tsuen Wan Shing Mun Valley   25.4 C               36.8 C
Hong Kong Park               25.7 C               35.1 C
Shau Kei Wan                 23.3 C               37.2 C
Kowloon City                 25.1 C               36.3 C
Happy Valley                 26.8 C               37.9 C
Wong Tai Sin                 26.7 C               37.2 C
Stanley                      24.4 C               33.4 C
Kwun Tong                    26.1 C               36.8 C
Sham Shui Po                 26.7 C               36.2 C
Kai Tak Runway Park          26.1 C               35.6 C
Yuen Long Park               26.7 C               37.4 C

Duration of sunshine (King's Park):              10.0 H

The mean UV index recorded at King's Park was 4,
the UV intensity was Moderate.
The maximum UV index was 9.

The 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                           average
Ping Chau                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.15
Tsim Bei Tsui                       0.13 
Cape D'Aguilar                      0.13 
Chek Lap Kok                        0.14  
  1. From readings taken at various locations in Hong Kong during the period 1987-2015, the background ambient gamma radiation levels may vary between 0.06 and 0.30 microsievert per hour.
  2. The extent of health effects to a person as a result of exposure to radiation is expressed by a physical quantity called equivalent dose, in unit of sievert. Protective action may be required if there is an increase in the ambient gamma dose rate above background such that the total additional dose is expected to exceed 5000 microsieverts in a relatively short period of time. For example, a dose of 5000 microsieverts may be reached when the ambient gamma dose rate is 1000 microsieverts per hour (several thousand times above background) and lasts for 5 hours.
  3. The readings of ambient gamma radiation level from instrument are expressed in unit of gray, which is numerically equal to the gamma dose expressed in sievert.
Climatological Information for 09 Jul
Last revision date: <10 Jul 2016>