April in Xi'an is the windiest and the cloudiest month of the year. In April, the weather in Xi'an is typically warm. Average daily high temperature in April is about 21 degrees above zero. On average, Xi'an has 17 partly cloudy, 11 sunny, 1 rainy, and 1 cloudy day in April. April as well as May and October is considered the most comfortable time to visit Xi'an.