Planning for the weather is an important factor for making your trip to Copacabana a success, especially when you're splurging. The hottest months are usually November and October, with an average temperature of 9°C, while the coldest months are June and July, with an average of 6°C. The rainiest months in Copacabana are January, February, December and March, with each month seeing an average of 195 mm of rainfall.