How does relief affect the climate?

Relief means the shape of the land's surface.
It includes things such as aspect, which means the direction in which a slope faces. Aspect can affect local climate in a number of ways.
In the northern hemishere, south-facing slopes are usually warmer than north-facing slopes. The reason for this is:
1. Sunrays arrive at more direct angles on south-facing slopes. So they are more concentrated ang give more heat.
2. South-facing slopes get longer then periods of daily sunshine, while north-facing slopes are sometimes in the shade.
3. South-facing slopes are sheltered from cold northerly winds.