Our study of the Eastern Nigerian environment is enhanced by an appreciation of the spatial arrangement and temporal variability of the elements of weather and climate. Atmospheric conditions from day to day, from month to month and from year to year are all-pervasive in their impact upon both earth and man. Weather and climate have a direct effect on human health, efficiency and psychology, and an indirect effect on man’s economic activities through the interaction with soils, vegetation, crops, geomorphic processes and hydrology.