Can someone tell me why the skys blue

"Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time." -NASA

From the lights reflecting all different ways to make the sky blue.

the climate of each region is different from one another.