Temperatures in Hong Kong will dip to 13 degrees Celsius (55.4 Fahrenheit) on Monday before rising slightly in the middle of next week.
The Observatory said residents could expect cool weather on Saturday, with the mercury ranging between 15 and 17 degrees.
“Temperatures over the region will fall later. It will be rather cool on Monday morning,” the weather forecaster said.
“The monsoon will moderate gradually midweek next week. Temperatures over coastal areas will rise slightly.”
Temperatures on Monday are projected to range between 13 and 15 degrees. A mild and humid maritime airstream is expected to affect the coast of Guangdong province in the latter part of next week, bringing patches of rain.