The current cold spell prevailing in Hong Kong saw the temperature in urban areas drop to 6.8 degrees Celsius on Thursday morning, the lowest so far this winter.
Tai Po in the New Territories recorded 4.6C, while Sha Tin recorded 5.8C and Tseung Kwan O 5.3C.
And in Kowloon City, the temperature dropped to 5.3C, according to the Observatory’s online weather bulletin.
Tai Mo Shan, the highest mountain in Hong Kong, recorded minus 1.8C at midnight.
Despite the low temperatures, a few people went to Tai Mo Shan to observe the ‘super blue blood moon’ – a rare lunar event when a second full moon occurs in a month, with the moon at its closest to the earth, plus a full lunar eclipse, Apple Daily reported.
A visitor from mainland China went to the mountaintop to see the frost but was disappointed.
The Observatory said the cold winter weather would continue in Hong Kong and southern China till the latter part of next week.
A dry continental airstream over the next few days is expected to bring fine and dry weather over the south China coast with a relatively large temperature difference between day and night.
The maximum temperature over the weekend was likely to be around 14C, but at night it would go down to 8C.
Meanwhile, the Hospital Authority said nine people aged from 58 to 91 had been admitted to local public hospitals for hypothermia. Three were in a critical condition, with three others serious and the rest in a stable condition.