A study of the rain requirements of coffee trees, carried out in various districts of Venezuela, led to the following general conclusions. (1) Little or no rain during the months preceding flowering has a beneficial effect on the crop. (2) During flowering, ideal quantities of well-distr1buted rain are required. (3) Between the flowering periods, heavy or excessive rains are not desirable. (4) Severe drought immediately following flowering is even more detrimental than excessive rain. (5) Except in extreme cases the total amount of rain does not appear to affect the yield.