WorldClim is a set of global climate layers (climate grids) with a spatial resolution of a square kilometre. They can be used for mapping and spatial modelling in a GIS or other computer programs. The database is documented in this article: Hijmans, R.J., S.E. Cameron, J.L. Parra, P.G. Jones and A. Jarvis, 2005. Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology 25: 1965-1978.