Tropical climates are found near the equator where the sun shines intensely. Tropical wet regions, also known as rainforests, have some of the most predictable weather on Earth, with each day being quite similar to the next. Humidity in tropical rainforest regions is quite high, maintaining a range of 77% to 88% year-round.
Rainbows occur when there is moisture in the air and sunlight at a low angle, conditions that are often met in tropical rainforests due to frequent rain and sunshine.
Equator region have more balanced day and night times around the year. Day and night are approximately the same length along the equator, each lasting about 12 hours. This is because the sun rises and sets almost vertically at the equator