For example, depicted here is the UEA CRU CRU05 precipitation climatology (1961-90), using a fantastic new dataset of mean monthly values interpolated from station data to 0.5 degree lat/lon [read about it!]. Kilimanjaro is located in Tanzania, at the bend just inside the northern border (approx. at center of image; see May or June isohyet).
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Reference:  New, M., M. Hulme, and P. Jones, 1999: Representing twentieth-century space–time climate variability. Part I: development of a 1961–90 mean monthly terrestrial climatology. J. Climate, 12, 829–856.