Buenos Aires has four distinct seasons in the Southern Hemisphere. Spring (September-November) and fall (March-May) offer ideal weather with comfortable temperatures (15-25°C / 59-77°F), lower humidity, and clear skies. Summer (December-February) brings hot, humid weather (25-35°C / 77-95°F) with afternoon thunderstorms. Winter (June-August) is mild (5-15°C / 41-59°F) with occasional rain.
Best times to visit: October-November (spring) for perfect weather and blooming parks, or April-May (fall) for mild temperatures and fewer tourists. December-February can be extremely hot and congested. June-August is quiet but chilly.
Events to consider: Tango Festival (August), International Film Festival (April), Fashion Week (August), Gay Pride Parade (November).