In April, the weather in Lào Cai is typically warm. Average daily high temperature in April is about 25 degrees above zero. On average, Lào Cai has 22 rainy, 4 sunny, 3 partly cloudy, and 1 cloudy day in April. The rains are usually heavy. April as well as January, May, June, and July is considered the most uncomfortable time to visit Lào Cai.