Rainfall: The average of rainfall each year in a rainforest goes up to 50 to 60 inches (125 to 660 cm). It rains almost everyday up to 80 inches. Temperature: The temperature in a rainforest rarely gets over 93 °F (34 °C) or drops below 68 °F (20 °C). The average temperature is 85 °F or 29 °C.