On Ray Bradbury's Venus, it rains all the time, night and day. In fact, the sun only comes out for about an hour once every seven years. There is a constant noise in the background of rain falling.
None of the nine-year-old children in the story except Margot can remember ever seeing the sun. As a result, the other children envy Margot for her knowledge. Margot can remember the sun because she came from Earth to Venus later than they did.
The children are beside themselves with joy and excitement as they play outside for the brief time the sun comes out. As the story states, they were:
like animals escaped from their caves, they ran and ran in shouting circles. They ran for an hour and did not stop running.
As a result of this lack of sunlight, the terrain the children play on is very grayish and white. It is described as:
the color of rubber and ash, this jungle, from the many years without sun. It was the color of stones and white cheeses and ink, and it was the color of the moon.
Unfortunately, the children who have locked Margot in a closet as a prank forget about her in their excitement over the sunshine.