In Zhuhai, winters are not cold. Though January is the coldest month, the temperature is above 10°C (50 °F) most of the time and the average temperature is about 16 °C (61 °F). Generally, a wool sweater and a thick coat are adequate. It is snowless and frostless but it is windy. The rainfall is low so the days are dry. Since the sun is shining, wear sunscreen with SPF 8-12 to protect your skin.
January falls during the low travel season and the Chinese New Year (the Spring Festival) is this month. During this time, you can experience authentic Chinese culture. However, train and flight tickets are hard to get because of the crowds. If you plan to travel, make arrangements in advance.