Santiago is hot from November to Apri, although nights can be cool. May to October are cooler, and nights can be cold.
Patagonia is warmest from November to March, although nights are still cool and it can get very windy. The Lake District in Chile has warm days, but cool nights, from November to April, although it can be wet. San Pedro de Atacama has warm days and cool nights all year, with virtually no rain. Easter Island has temperatures from the low to mid twenties and steady rainfall all year round.