in the summer solctice the days are longer and its warmer. in the winter solstice the night comes earlier and lasts shorter. it is also colder unless you live in Florida like me when the weather changes year round.
It has to do with the earths rotation on its axis and the South and North poles being nearest or farthest from the Sun. This is a Natural Sciences question so you should look up a Natural Sciences...
-- The earth travels in a nearly-circular path around the sun. One full trip in one year. -- The earth also spins. One full spin in one day. The sun shines on you during about 1/2 of each spin, and...