Weather will likely play an important role when you plan your trip to Iquique, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January with an average temp of 70°F, while the coldest months are August and July with an average of 61°F. From January through March, the daytime average is 79°F and the nighttime average is 64°F. Between April and June, temperatures average 75°F during the day and 55°F at night. July through September averages 70°F during the day and 53°F at night. In October-December, the average temperature is 75°F during the day and 56°F at night.