Weather will likely play an important role when you plan your trip to Pisco, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March with an average temp of 73°F, while the coldest months are August and September with an average of 63°F. From January through March, the daytime average is 78°F and the nighttime average is 69°F. Between April and June, temperatures average 74°F during the day and 62°F at night. July through September averages 67°F during the day and 59°F at night. In October-December, the average temperature is 73°F during the day and 61°F at night.