Hong Kong Observatory Logo

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

Yesterday's Weather and Radiation Level

Hong Kong Observatory:
Maximum Air Temperature: 19.2 C
Minimum Air Temperature: 13.7 C
Grass Minimum Temperature: 10.2 C
Relative Humidity: 44 - 77 percent
Rainfall: 0 mm

Total Rainfall since 1st January: 4.7 mm
Against an average of 17.5 mm

Other Stations
Min
Max
King's Park
12.3 C
20.3 C
Wong Chuk Hang
11.5 C
19.9 C
Ta Kwu Ling
5.1 C
21.8 C
Lau Fau Shan
9.6 C
19.8 C
Tai Po
9.7 C
18.2 C
Sha Tin
9.3 C
19.9 C
Tuen Mun
11.7 C
22.2 C
Tseung Kwan O
9.2 C
19.5 C
Sai Kung
12.8 C
17.8 C
Cheung Chau
10.9 C
21.6 C
Chek Lap Kok
11.7 C
19.5 C
Tsing Yi
11.3 C
20.7 C
Shek Kong
7.9 C
21.5 C
Tsuen Wan Ho Koon
9.5 C
20.6 C
Tsuen Wan Shing Mun Valley
9.5 C
21.6 C
Hong Kong Park
12.7 C
19.8 C
Shau Kei Wan
12.1 C
18.7 C
Kowloon City
12.2 C
20.9 C
Happy Valley
11.0 C
19.9 C
Wong Tai Sin
11.9 C
20.1 C
Stanley
13.2 C
18.1 C
Kwun Tong
12.4 C
19.2 C
Sham Shui Po
12.4 C
20.6 C

Duration of Sunshine (King's Park): 9.8 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 (23 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
0.10
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