Hong Kong Observatory Logo

Bulletin updated at 00:15 HKT
23/ Jan /2019

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 19.1 C
Minimum Air Temperature: 13.1 C
Grass Minimum Temperature: 11.7 C
Relative Humidity: 41 - 68 percent
Rainfall: 0 mm

Total Rainfall since 1st January: 4.7 mm
Against an average of 14.8 mm

Other Stations
Min
Max
King's Park
12.0 C
19.5 C
Wong Chuk Hang
12.6 C
19.6 C
Ta Kwu Ling
8.1 C
19.2 C
Lau Fau Shan
10.8 C
18.5 C
Tai Po
11.2 C
19.2 C
Sha Tin
11.7 C
19.2 C
Tuen Mun
12.0 C
19.8 C
Tseung Kwan O
10.4 C
20.7 C
Sai Kung
12.1 C
18.3 C
Cheung Chau
11.8 C
21.6 C
Chek Lap Kok
12.6 C
19.0 C
Tsing Yi
12.5 C
20.6 C
Shek Kong
10.2 C
19.7 C
Tsuen Wan Ho Koon
10.6 C
18.1 C
Tsuen Wan Shing Mun Valley
11.6 C
20.8 C
Hong Kong Park
13.2 C
19.9 C
Shau Kei Wan
12.0 C
19.8 C
Kowloon City
11.6 C
19.8 C
Happy Valley
13.1 C
20.3 C
Wong Tai Sin
12.1 C
20.4 C
Stanley
12.6 C
19.1 C
Kwun Tong
11.3 C
20.5 C
Sham Shui Po
12.5 C
21.2 C

Duration of Sunshine (King's Park): 10.0 H
The mean UV Index recorded at King's Park yesterday was 3,
the UV intensity was Moderate
The maximum UV Index for yesterday was 6.
Yesterday's (22 Jan) 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 (microsievert/hour)
King's Park
0.15
Ping Chau
0.09
Tap Mun
0.09
Kat O
0.11
Yuen Ng Fan
0.12
Tai Mei Tuk
0.12
Sha Tau Kok
0.10
Kwun Tong
0.13
Sai Wan Ho
0.09
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.
homeback