August in Iquitos is the sunniest month of the year. In August, the weather in Iquitos is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Iquitos has 22 rainy, 6 partly cloudy, and 3 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Iquitos.