Tropical rainforests have an average temperature of between 25 and 30 degrees Celsius during the 12 hours of daylight. However, only approximately 2% of this daylight hits the forest floor. On average, tropical rainforests have anywhere from 1500 mm to 2500 mm of rain every year. With rain almost every day, it means that it is usually quite cloudy. Also, because Tropical rainforests are in the general area of the equator, they are very humid environments.