The society and economy of India are crucially dependent on monsoon rains for its agriculture needs. The assessment of spatial and temporal aspects of trends in precipitation is critical for this region of India as the basin has areas which frequently experience droughts and water scarcity. The purpose of this research was to investigate the Spatio-temporal variations in precipitation in terms of month wise, monsoon and annual trends in West Flowing River Basin of Kutch, Saurashtra, and Marwar (WFR-KSM basin). The trend was calculated and assessed in ProUCL5.0.00 and ArcMap 10 software's using Indian Meteorological Department (IMD) Precipitation grid data (0.25° x 0.25°) with a temporal resolution of 1964-2013 representing 50 years daily data. The direction and magnitude of annual, monsoon and month wise trends in long-term precipitation data were calculated for every grid using Mann-Kendall (MK) test and Theil- Sen’s (TS) slope. Annually and in monsoon season, the increasing trend in precipitation was exhibited by a major part of the basin. The decreasing trend was confined to northern and north-eastern regions. The month wise trend analysis indicated either no grid or few grids exhibited a trend in non-monsoon months. The June, July, August, September (monsoon) months exhibited spatial variation in trends. The majority of the grids in June, July and August months exhibited increasing trends and a few grids with declining trend were clustered mainly in western and north-eastern part of the basin.