An easterly airstream is affecting the coast of Guangdong, and a broad cloud band covers the area.
In addition, an area of low pressure brought unstable weather to the southern Philippines.
The Observatory forecasts that the local area will be mostly cloudy today with a cool morning.
There are short periods of sunshine during the day, and the maximum temperature is about 20 degrees.
Moderate to fresh east to northeasterly winds, with occasional strong winds offshore.
The Observatory's outlook is that it will be mostly cloudy for the next two or three days with one or two showers.
Temperatures dropped significantly Saturday night.
Quite cool from Sunday to Lunar New Year holidays.
The Transport Department said that to tie in with the mandatory testing arrangements, a section of Sheung Kok Street outside Yat Kwai House in Kwai Chung Estate is still closed.