March in Iquitos is the rainiest month of the year. In March, the weather in Iquitos is typically hot. Average daily high temperature in March is about 30 degrees above zero. On average, Iquitos has 29 rainy, 1 sunny, and 1 cloudy day in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Iquitos.