If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Iquitos: The hottest months are usually September and October, with an average temperature of 26°C, while the coldest months are July and June, with an average of 25°C. The rainiest months in Iquitos are March, April, January and December, with each month seeing an average of 348 mm of rainfall.