Ray Bradbury's short story "All Summer in a Day" is set sometime in the distant future on the planet Venus, where it rains continually for seven straight years at a time. The colonizing citizens live in complex underground tunnels to avoid the torrential downpours each day. While Bradbury does not give a specific date indicating when the story is set, the audience can infer that the story takes place in the distant future judging by the complex society built on a faraway planet.

The main character, Margot, is an outcast, who is bullied and criticized by her classmates for being different. Unlike the other nine-year-old students, Margot moved to Venus five years ago and remembers seeing the sun when she lived in Ohio. Margot has no friends and is portrayed as a rather timid, melancholy girl, who misses the warmth of the sun. On the exact day that the rain is supposed to stop, Margot's classmates lock her inside a closet, where she misses the rare opportunity to enjoy the sun.

The story is set in Venus sometime in the future on a day when the rain stops briefly.

A group of children are living on Venus.  It rains every day for seven years.  The children have not seen the sun in all that time.  The children are nine years old, and have not seen the sun since it came out seven years before for an hour.

And this was the way life was forever on the planet Venus, and this was the schoolroom of the children of the rocket men and women who had come to a raining world to set up civilization and live out their lives.

A girl named Margot came from Earth, and remembers the sun.  The other children are angry because she has seen it and they haven’t.  On the one day the sun comes out they decide to lock her in a closet, and she misses the few minutes of sun.

The story demonstrates that children are children, no matter the setting.  The children are cruel to Margot because she is different, and because they are jealous.  Due to their actions, she misses seeing the sun.  Only then do the children regret what they have done.