Weather will likely play an important role when you plan your trip to Pisco, but bear 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 temperature of 23°C, while the coldest months are August and September, with an average of 17°C. Between January and March, the daytime average is 25°C and the night-time average is 21°C. Between April and June, temperatures average 24°C during the day and 17°C at night. Between July and September, the temperature averages 20°C during the day and 15°C at night. Between October and December, the average temperature is 23°C during the day and 16°C at night.