In all Summer in a Day by Ray Bradbury, Ray Bradbury uses both similes and metaphors to make the details of the story more clear. For example in the first few sentences it says “The children pressed to each other like so many roses and weeds intermixed. This helps the reader identify that some of the kids are good being the roses and some of the kids are bad being the weeds.
On the other hand of course you could say that Ray Bradbury uses similes and metaphors because that is the way he writes stories but it basically makes the details more clear. Another example of Ray Bradbury making the details more clear is on page 3 it said “The rain stopped as if in the midst of a film concerning an avalanche, a tornado, a hurricane, a volcanic eruption.”