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Precipatation and ETo for West Tracy, CA <br /> *** Estimated <br /> *Ave. Eto *Ave. Precip. Deep Perc. <br /> Month (in/mo) (in/mo) (in/mo) <br /> IF LZIq 2.63 1.39 <br /> Feb 1.96 2.16 0.20 <br /> Mar 3.41 1.59 <br /> Apr 5.10 0.80 <br /> May 6.82 0.39 <br /> Jun 7.80 0.11 <br /> Jul 8.06 0.03 <br /> Aug 7.13 0.07 <br /> Sep 5.40 0.25 <br /> Oct 3.72 0.63 <br /> Nov 1.80 1.66 <br /> Dec 0.93 1.86 0.93 <br /> Sum: 53.37 in/yr 12.18 in/yr 2.52 in/yr <br /> * Source: California Irrigation Management Information Systems(Zone 12) <br /> (www.cimis.watenca.gov) <br /> ** Source: Western Regional Climate Center(Station 049001)Feb 1955 to Sept 2004 <br /> (http:11www.wrcc.dri.edu/) <br /> *** Assumption: If monthly precipitation exceeds potential ET then <br /> the difference is potential deep percolation. <br /> Plate 1 <br />