There are many websites online that will provide you with historical weather data for the region of Santarém, Brazil. One of these is CLIMATES TO TRAVEL. Basically, August/September is part of the dry season. Under normal circumstances that means lots of sunshine, high temperatures, hardly any rain and high humidity. However, storms, strong winds and heavy rainfall are a possibility.

In general, for people who do not live in a similar climate, the jungle and surrounding areas will be hot and humid. Unless there is some wind or they are in a car or room with air conditioning, visitors will constantly sweat. In the tree covered areas it will feel even worse. It’s normal to be soaken wet within minutes. Needless to say that this means drinking sufficient amounts of water and taking salt tablets are a must under these circumstances. It may also mean to take it easy on uphills that you would normally laugh about.

In the evening it can be challenging to sleep because it is so hot. Still, in the early hours of the day it can be cool enough to need a blanket when sleeping outside in a hammock.