Mean aerological data for the West Indies area have been prepared from ten-year records for three stations. Mean monthly height, temperature and relative humidity data are tabulated for constant pressure surfaces. More detailed information, including density, potential temperature and specific humidity, is shown for the mean annual and the mean “hurricane season” soundings. The mean data are compared with those previously presented and some of the interesting climatological features are discussed. Abstract Mean aerological data for the West Indies area have been prepared from ten-year records for three stations. Mean monthly height, temperature and relative humidity data are tabulated for constant pressure surfaces. More detailed information, including density, potential temperature and specific humidity, is shown for the mean annual and the mean “hurricane season” soundings. The mean data are compared with those previously presented and some of the interesting climatological features are discussed.