Modern agriculture has growing concern over the climatological impacts specially on the rainfall. Rainfall pattern and its distribution have great effect on the economics of our country and specially to the areas where rainfed agriculture is the major source of income for the farming community. In view of this analysis of rainfall data for Howrah district of West Bengal under the hot moist sub-humid agro-ecological sub-region is carried out for three equal period of time distributed over 42 years (1970-2011). The analysis of the rainfall data are made with respect to the distribution of rainfall over different seasons (pre-monsoon, monsoon and post-monsoon), assessment of the drought, normal and surplus years and months and probability analysis of the drought, normal and surplus months. The data revealed that there is decreasing trend in rainfall and increase in the number of drought months over the last 14 years under study. The drought periods are generally concentrated in between November to March whereas the normal to surplus periods are from April to October irrespective of the period under study.
