Monsoon rain display significant large inter-annuel variability leading to widespread drought and flood situations. Effect of drought is accentuated by the higher coefficient of variability over region of lower seasonal rainfall (Parthasarathy, 1984).In India, long-term time series of summer monsoon rainfall has no discernible trends, but decadal departures are found above and below the long time average alternatively for 3 consecutive decades and the same study employing non-parametric methods showed a decreasing trend for rainfall variables (Kothyari and Singh, 1998). Recent decades have exhibited an increase in extreme rainfall events over northwest India during the summer monsoon (Singh and Sontakke, 2004). Present investigation was carried out in the eastern agroclimatic zone of Haryana located in north-western part of India with representative locations being Karnal and Ambala for obtaining the long term trend and variability of rainfall.
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