Changes in precipitation will be one of the most critical factors determining the overall impact of climate change. Spatial-temporal variations in rainfall affected runoff, soil moisture, and underground water reserves. The analysis of precipitation trend is important in climate-change studies for planning and effective water resource management. In this study, long-term annual and seasonal trends of Precipitation were identified for region 15° W to 135° E over period of 1982-2016 Using CHIRPS precipitation data. The statistical significance of trends is assessed by the Mann- Kendall test. Our target in this research is to investigate the trend of precipitation and to know how it changes during the study period.

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