It would block the suns rays from coming in and keep heat traped, typically causing the minimum temperature to lesson along with the maximum. I believe that the temperatures also tend to equill each other out more, such as 45-55 instead of 55-85, and that's why coastal regains are more moderate compared to inland.<span />
Common Examples of Diffusion. You can smell perfume because it diffuses into the air and makes its way into your nose. A teabag placed in a cup of hot water will diffuse into the water. Placing food coloring in a liquid will diffuse the color.