National Weatherperson's Day is celebrated on February 05, 2018. National Weatherperson's Day, also known as National Weatherman's Day, is a holiday observed primarily in the United States. It recognizes individuals in the fields of meteorology, weather forecasting and broadcast meteorology, as well as volunteer storm spotters and observers. It is observed on the birthday of John Jeffries, one of the United States' first weather observers who took daily measurements from 1774 to 1816. To celebrate the day, you could simply watch a weather's forecast.