Abstract: The West Central Valley is the area of highest population density and industrial and commercial development in Costa Rica. In the WCV, environmental assessments are only partially carried out due to several limitations associated with its size, but especially associated with the processes of pollutant distribution by wind. Even so, the VCO is apparently an atmospheric basin, but the establishment of this situation depends especially on the analysis of the distribution and circulation of winds in this area, as well as their variability during the year. This study aims to establish the wind characteristics in the WCV in order to have general references at all available points, as well as the general annual, monthly and hourly variation. The methodology applied will be to model the velocity distribution by the Weibull equation and to establish the wind direction distribution at each site. This will allow to obtain wind roses per site and to generate a general wind movement map in the WCV |