March in San Andres is the sunniest and the coldest month of the year. In March, the weather in San Andres is typically warm. Average daily high temperature in March is about 27 degrees above zero. On average, San Andres has 20 sunny, 8 partly cloudy, and 3 rainy days in March. The rains are usually light. March as well as April is considered the most comfortable time to visit San Andres.