fohn wind windy sirocco Bellamya summers monsoonal Habagat hot 40QdgC chinooks 40QfC Foehn desiccating wet cold estivate weather sunny 32QdgC 9QdgF humidity 88QdgF colder Tehuano cool 38QdgC 15QdgC Respirators Cers warm easterlies katabatic khamsin 45QdgC Temperatures sandstorms