Weather will likely play an important role when you plan your trip to Copiapó, but bear 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 temperature of 20°C, while the coldest months are July and June, with an average of 14°C. Between January and March, the daytime average is 28°C and the night-time average is 14°C. Between April and June, temperatures average 25°C during the day and 9°C at night. Between July and September, the temperature averages 23°C during the day and 8°C at night. Between October and December, the average temperature is 27°C during the day and 12°C at night.