Cloud and heavy rainfall are forecast for Hong Kong on Sunday, in what is already Hong Kong’s wettest January in more than 50 years. Hong Kong Observatory scientific officer Tsoi Tze-Shun said an upper air disturbance beginning on Friday would bring rain to the city. “We expect there will be an upper air disturbance which will affect the South China Coastal areas so as a result there will be occasional rain in Hong Kong ... especially on Sunday when the rain will be heavy at times,” he said. It comes in the middle of an unusually wet January in Hong Kong, with 89.7mm of rain falling in the past two weeks, more than triple the average. READ MORE: Hong Kong weather: first January amber rainstorm warning issued Already, 2016 has had the wettest January in 52 years in town. Tsoi said cloudy weather would start to move into the city on Friday, with rain patches, before the heavier rain fell on Sunday. “Also later on Sunday we expect there will be a cold front which will move across the coast of Guangdong,” he said. “Temperatures will fall to around 14 degrees on Sunday midnight then around 13 degrees on Monday morning.” After the gloomy weekend, Tsoi said weather should improve from the beginning of next week. “We expect after the transition of the cold front, there will be some sunny periods on Monday,” he said.