Temperatures in Hong Kong dropped to about 23 degrees Celsius (73 Fahrenheit) on Tuesday morning, the lowest so far this autumn. According to the Hong Kong Observatory, the cooler weather was caused by a dry northeast monsoon. “A dry northeast monsoon will bring mainly fine weather to the coast of Guangdong in the next couple of days. It will be windier and slightly cooler in the morning over the region,” the forecaster said. “The monsoon is expected to moderate slightly in the latter part of...