Brasilia has a tropical climate, with a distinct wet and dry season, but it is warm or hot all year round. The dry season runs from March to September, and humidity can be as low as 20% during these months, with average temperatures of around 28°C in the daytime. The wet season, from October to February, sees rain on as many as 20 days a month, with humidity of up to 80%. Nighttime temperatures do not fall much below 16 or 17°C.
During the meeting the weather will be mostly sunny and warm 28ºC – 30ºC (daytime temperatures) and 19°C – 17ºC (nighttime temperatures).