It shows You what the exact area is like e.g. Califonia hot so yellow or red! simple as that:
Italy's climate varies from the cool mountains in the north, to the balmy coastal regions.
Italy's Climate effects Italy because Italy is very warm, and it is very warm, which effects the farming season, and makes the winter season cold.
A climate map is a map use to identify climates throughout the world or a specific region. It would also be a good map for tourists.