Hongkongers will likely have to brave some heavy rain for the Dragon Boat Carnival and June 4 vigil this weekend. The Observatory has warned that the sunny weather seen in the past week will give way to thunderstorms. “A trough of low pressure will bring heavy showers and thunderstorms to southern China in the next couple of days,” the forecaster said. Crowds stay away from Dragon Boat Carnival finale as bad weather continues in Hong Kong The poor weather could disappoint those planning to watch the races at the 2017 Hong Kong Dragon Boat Carnival, set to be held at the Central Habourfront. Those attending the June 4 candlelight vigil at the Victoria Park on Sunday may also have to brave the rain. The weather will become sunny again with temperatures hitting 30 degrees Celsius by Tuesday, although a few showers are still expected, the Observatory said.