Tropical rainforests have highly predictable weather due to their proximity to the equator. Temperatures do not drop below 68°F nor does it exceed 93°F, and humidity remains at about 80% during the day. Thus, packing light clothing would best keep travelers cool. However, unlike the consistent temperature, rainfall depends on geographical location. Areas north of the equator will likely experience a wet season from June until October while areas south of the equator have a wet season from November to May. This phenomenon can be explained by the movement of the Intertropical Convergence Zone (ITCZ) because as it travels north or south of the equator, it brings rain and moisture. In Costa Rica, for example, it would be wise to carry an umbrella and raincoat if traveling during the summer since 15 inches of precipitation could fall at most during a single month’s time. However, in the Amazon, they receive the majority of their rainfall during their summer (Costa Rica’s winter).
The best time of the year to travel to a tropical rainforest depends on the individual's preference. If less rain seems appealing, it would be best to go to a northern hemisphere location during between November and May and a southern hemisphere area from June until October. However, given that temperatures stay constant throughout the year, there is nothing that can be done to avoid the heat and humidity. In attempt to be less hot, pack thin summer clothes that will keep the body cool.