If you planning to travel to Plaza San Martin, Buenos Aires, Argentina, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 8:30 AM. The temperature feels like 78.7 with a humidity level of 69 so dress accordingly. Cloud coverage is 36 percent with visibility at 14.9 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling east-northeast at a speed of 9 MPH. At the end of the day don’t miss the sunset at 10:44 PM.