It's time get those winter woollies out - temperatures are expected to drop by up to 10 degrees Celsius in the next few days. The Observatory forecasts temperatures of between 13 and 18 degrees today. But it is going to get colder and drier, with the mercury dropping to as low as 11 degrees tomorrow with the arrival of the winter monsoon along South China's coast. 'There will be a few patches of rain on Friday [today] first, but the weather will turn fine then,' Yeung King-kay, a senior scientific officer at the Observatory, said. The cold spell will last for a few days. The forecaster on the mainland yesterday warned that some inland areas faced possible snowstorms. In Guangdong, a plunge to a low of 6 degrees is expected tomorrow. Earlier, the Observatory confirmed that the city this year had experienced its warmest autumn. The mean temperature readings between September and November was 25.8 degrees, which was the same as the historical record set in 2005.