Climatogram
The Amazon Rainforest is a very warm and humid place. In the months July through December, the average temperature increases, but only by a few degrees. March is the peak of the "rainy" season and the lowest point is in August.
Data Source: http://www.absolutevisit.com/travel/Amazon-Rain-Forest/average-monthly-weather-and-precipitation
Picture (above): http://www.lovethesepics.com/2011/10/amazing-amazonia-amazon-rainforest-46-pics/
(left): http://www.lovethesepics.com/2011/10/amazing-amazonia-amazon-rainforest-46-pics/
(left): http://www.lovethesepics.com/2011/10/amazing-amazonia-amazon-rainforest-46-pics/