How cold is it in winter in Xi?

Do you often go to school or live there? The weather in Xi 'an is very strange, and summer can last until the middle and late days of 10. Autumn is short, and the weather is cold at once. In winter, it is warm when the sun shines and cold when it rains sleet. But winter is warmer than the whole of Beijing. Add clothes when it is cold, and reduce it when it is hot. I didn't wear a sweater in winter in Xi 'an, but I only wear a down jacket when it is particularly cold. Nationally, compared with Beijing, the weather in Xi is OK.