Abstract
Nishina and Mikami(2010) discuss the diurnal variation of the station air-pressure using the hourly data for 20-year summers in Kumagaya , and the inter-annuai and secular variation using every 6-hour data for 50-year summers(Nishina and Mikami, 2011). In this paper, authers discuss the inter-annuai and secular variation using every 6-hour data for 50-year summers in Choshi and compare with the results obtained in Nishina and Mikami(2011).