January in Portoviejo is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Portoviejo is typically warm. Average daily high temperature in January is about 26 degrees above zero. On average, Portoviejo has 31 rainy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Portoviejo.