The best time to visit Argentina is between November and March when the weather is at its best. Be warned that the Patagonian climate is unpredictable and the weather can change with little warning. Buenos Aires is ideal in its autumn (Mar-May) and spring (Sep-Nov). Summer can be hot and humid while winter can be overcast, chilly, and rainy. October and November are also good months to visit when the city’s jacaranda trees are in full bloom.