According to Wikipedia
Tropical rainforests are characterized in two words: warm and wet. Mean monthly temperatures exceed 18 °C(64 °F) during all months of the year.[4]Average annual rainfall is no less than 168 cm (66 in) and can exceed 1,000 cm (390 in) although it typically lies between 175 cm (69 in) and 200 cm (79 in).[5].
Around 40% to 75% of all biotic species are indigenous to the rainforests.[1] It has been estimated that there may be many millions of species of plants, insects and microorganisms still undiscovered in tropical rainforests. Tropical rainforests have been called the "jewels of the Earth" and the "world's largestpharmacy", because over one quarter of natural medicines have been discovered there.[2] Rainforests are also responsible for 28% of the world's oxygenturnover, sometimes misnamed oxygen production,[3] processing it through photosynthesis from carbon dioxide and consuming it through respiration.
The undergrowth in a rainforest is restricted in many areas by the poor penetration of sunlight to ground level. This makes it easy to walk through undisturbed, mature rainforest. If the leaf canopy is destroyed or thinned, the ground beneath is soon colonized by a dense, tangled growth of vines, shrubs and smalltrees, called a jungle
So with all the above being said, living here in the Pacific Beach area of Coronado, we have not seen much rain at all yet this wet season, which basically started mid-March, our mountain and city friends are getting their fair share, but we are still pretty dry.
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