San Juan's climate is characterized by mild winters and hot summers. The warmest months, January and December, bring temperatures often reaching over 35°C, with averages around 26-27°C. In contrast, the coldest months, June and July, experience lows of -6°C, but temperatures rarely drop below freezing. Spring (September to November) and autumn (March to May) are relatively mild, with temperatures ranging from 15°C to 30°C on average. Summer's heat peaks in January, while winter's chill is brief and moderate.