Temperature and precipitation vary from place to place and from season to season. In those regions where the rains are falling or where the skies are covered with cloud, the summer temperature is relatively lower. But during the winter, the clouds check the loss of heat by terrestrial radiation. Thus, in cloudy regions, the wintertime temperature is allowed to fall much. Therefore in such a region, the annual range of temperature is relatively smaller than those regions where the weather is clear and dry.