Xi'an
Unlike some cities in China, Xi’an enjoys four distinct seasons. Spring is mild, but be sure to stay indoors if sandstorm warnings take effect. Summers in Xi’an are hot and humid. Autumn is your best bet if you want to comfortably explore the historical sites: In September and October, the city begins to cool to a comfortable temperature. The leaves on the gingko trees begin to change color, making attractions and historical sites appear even more magical. However, if you love the cold and are willing to brave temperatures below zero, consider visiting during the dry Xi’an winter, which brings fewer crowds and the opportunity for skiing.