weather in buenos aires in march
1. Re: weather in March in Buenos Aires. Jan 03, 2011, 7:33 PM. The weather can be perfect in March. The hot days of Summer are over and the temps are mild. Day trips from the city of Buenos Aires can be Colonia in Uruguay or Montevideo. A trip to an estancia out of the city near San Antonio de Areco.. A visit to the delta region called Tigre.