The tropical rain forest has two seasons: a wet season and a dry season. The traditional seasons of spring, summer, fall and winter are absent in rain forests.
Each season, wet and dry, lasts six months of the year. In the Amazon rain forest, the wettest part of the season lasts from December until May. During the wet season, as much as 6 to 12 feet of rainfall can occur. June through August marks the driest months of the dry season. During this time, there is only an average of 6 inches of rain. The alternating wet and dry seasons in the region cause the Amazon river to rise and fall at a rate of 40 feet every year.