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When to Go
The dry season (low water) between Belém and Manaus runs roughly from mid-June into December, and it's often brutally hot. Shortly before the new year, rains come more often and the climate cools a bit. The average annual temperature is 80°F (27°C) with high humidity. The early morning and the evening are always cooler and are the best times for walking around. The rainy season (high water) runs from December to June. "High water" means flooded forests and better boat access to lakes and wetlands for wildlife spotting. It also means flooded river beaches. Fishing is prime during low water, when fish move from the forest back into rivers and lakes, making them more accessible. Keep in mind that even the driest month has an average rainfall of 2 inches (compared with up to 13 inches during the wet season), so some kind of raingear is always recommended. Depending on where you are in the Amazon, during the rainy season it may rain every day, or three out of every four days, whereas during the dry season it may rain only one out of four days or less.
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