In terms of precipitation, rainfall in Manaus ranges from 0.8 - 14.2 inches per month. June is typically the wettest month, when rainfall can reach 14.2 in. January is typically the driest time to visit Manaus when rainfall is around 0.8 in.
If weather is an important factor for your trip to Manaus, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 78.8 F).