The Weather Watchers 3-Year Log Book offers the opportunity to record your own daily observations - in as much or as little detail as you wish. You can calculate weekly and monthly averages and then compare changing weather patterns over the three-year period. Is spring really coming earlier each year? Is this year hotter than last? What was the coldest day in your year? This illustrated record book is packed with facts, figures and information, including how to identify different cloud types, plus explanations on how clouds are formed along with other weather phenomena.