January in Puerto Viejo de Sarapiquí is the coldest month of the year. In January, the weather in Puerto Viejo de Sarapiquí is typically warm. Average daily high temperature in January is about 26 degrees above zero. On average, Puerto Viejo de Sarapiquí has 13 partly cloudy, 10 sunny, 6 rainy, and 2 cloudy days in January. The rains are usually moderate.