How much of the variability of cerebrovascular accidents are explainable by meteorologic factors and what meteorologic factors are more influential on cerebrovascular attacks and deaths are explored by various sets of standardized multiple linear regression analyses with the prerequisites of the evaluation of distribution characteristics and correlations of meteorologic factors to be included in the analyses. Meteorologic effect on cerebrovascular accidents is discussed in view of an acute precipitating stress as well as a chronic stress which promotes their intricate developmental mechanisms and is of importance in increasing susceptibility to them.