April in Shiyan is the cloudiest month of the year. In April, the weather in Shiyan is typically warm. Average daily high temperature in April is about 20 degrees above zero. On average, Shiyan has 9 partly cloudy, 8 cloudy, 7 rainy, and 6 sunny days in April. The rains are usually moderate. April as well as May, September, and October is considered the most comfortable time to visit Shiyan.