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Daily Weather Summary and Radiation Level on 08/08/2015

HKO Readings & Radiation Level

Daily Weather Summary and Radiation Level on 08/08/2015:

Hong Kong Observatory
Maximum Air Temperature                     36.3 C
Minimum Air Temperature                     30.0 C
Grass Minimum Temperature                   27.2 C
Relative Humidity                        47 - 80 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1387.9 mm
Against an average of                     1575.3 mm

Other Stations                Min                  Max
King's Park                  29.5 C               36.4 C
Wong Chuk Hang               28.5 C               35.4 C
Ta Kwu Ling                  26.6 C               36.4 C
Lau Fau Shan                 29.6 C               35.5 C
Tai Po                       29.7 C               36.1 C
Sha Tin                      29.0 C               36.8 C
Tuen Mun                     29.7 C               35.4 C
Tseung Kwan O                28.1 C               37.6 C
Sai Kung                     30.0 C               36.3 C
Cheung Chau                  28.5 C               35.9 C
Chek Lap Kok                 30.3 C               36.3 C
Shek Kong                    27.7 C               37.1 C
Tsuen Wan Ho Koon            28.9 C               35.1 C
Tsuen Wan Shing Mun Valley   27.8 C               36.7 C
Kowloon City                 30.4 C               36.7 C
Happy Valley                 29.6 C               37.9 C
Wong Tai Sin                 29.8 C               37.6 C
Kwun Tong                    30.6 C               36.6 C
Sham Shui Po                 31.0 C               37.3 C
Kai Tak Runway Park          30.0 C               36.9 C
Yuen Long Park               28.7 C               37.1 C

Duration of sunshine (King's Park):              10.8 H

The mean UV index recorded at King's Park was 5,
the UV intensity was Moderate.
The maximum UV index was 9.
Sea surface temperature (Waglan Island):        28.7 C 

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                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
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                      0.14 
Chek Lap Kok                        0.15  
  1. From readings taken at various locations in Hong Kong during the period 1987-2014, 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 08 Aug
Last revision date: <09 Aug 2015>