Weather is probably a major factor when you plan your trip to Caldera, 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 18°C, while the coldest months are July and August, with an average of 14°C. Between January and March, the daytime average is 22°C and the night-time average is 15°C. Between April and June, temperatures average 20°C during the day and 12°C at night. Between July and September, the temperature averages 17°C during the day and 11°C at night. Between October and December, the average temperature is 20°C during the day and 13°C at night.