Winter vacation weather in Suzhou, China, is characterized by cold and dry conditions. Temperatures typically range from 0°C to 5°C (32°F to 41°F) during the peak winter months of January and February. The city experiences little to no rainfall, with snowfall being rare but possible, especially in the northern parts of the city. The humidity is generally low, making the cold more bearable. According to the Suzhou Meteorological Bureau, the average annual temperature is around 16°C (60.8°F), and the coldest month is January, with an average temperature of 3.6°C (38.5°F).

The dry and cold weather during the winter months is due to Suzhou's location in the East China Plain, which is influenced by the monsoon winds. During the winter, the monsoon winds shift from the southwest to the northeast, bringing cold air from Siberia. This cold air mass is dry and results in the low humidity and cold temperatures experienced in Suzhou during the winter. Additionally, the city's proximity to the Yangtze River helps to moderate the temperatures, preventing extreme cold.

Data from the Suzhou Meteorological Bureau shows that the city receives an average of only 2.4 days of snow per year, with the last significant snowfall occurring in 2016. The dry conditions are further supported by the fact that the city's annual precipitation is around 1,100 mm (43.3 inches), with the majority of rainfall occurring during the summer months. This dry winter weather makes it an ideal time for outdoor activities such as ice skating and sledding, although such activities are rare due to the infrequent snowfall.

In conclusion, winter vacation weather in Suzhou is cold and dry, with temperatures ranging from 0°C to 5°C and little to no rainfall. The city's location in the East China Plain and the influence of monsoon winds contribute to the cold and dry conditions during the winter months. While snowfall is rare, the city's low humidity and moderate temperatures make it a comfortable destination for those seeking a winter getaway.