Thursday was the coldest May day in Hong Kong in almost a century, with temperatures plunging to 16.6 degrees Celsius in the morning.
This was the lowest temperature recorded in May since 1917 by the Hong Kong Observatory. The last time Hong Kong was this cold in May, the world was still fighting a great war, the Legislative Council had just eight official members and Russia's Romanovs were still in power.
The observatory said the weather was generally cool as an intense northeast monsoon and a rain band was affecting the coast of southeastern China.
A trough of low pressure – which formed in Guangdong earlier and brought a thunderstorm to Hong Kong on Tuesday afternoon – continued to affect unsettled weather in the region, it said.
Senior scientific officer Chan Sai-tick said the next few days were expected to remain cool and rainy.
Thursday’s record followed a generally warm week, with temperatures staying above 20 degrees and even hitting 30.6 degrees last Thursday.