I am going to study in Oklahoma, USA. What's the temperature there? Is it cold in winter? What should I pay attention to?

The climate in Oklahoma is basically mild. Ok, the north is usually cooler than other places; The climate in the east and south is humid, while the climate in the west is dry. Winter is short and mild, with an average annual temperature of 18℃ and a pleasant climate. The average snowfall in the northwest is 7 cm, and it increases to 22 cm in the southeast. The environment and climate of Oklahoma City are similar to those of most cities in the Yangtze River valley of China. Now the average outdoor temperature is about 40 degrees.