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Precipitation and ETo for East Tracy, CA <br /> *** Estimated <br /> *Ave. Eto *Ave. Precip. Deep Perc. <br /> Month (in/mo) (in/mo) (in/mo) <br /> Jan 1.24 1.90 0.66 <br /> Feb 1.96 1.72 <br /> Mar 3.41 1.37 <br /> Apr 5.10 0.84 <br /> May 6.82 0.45 <br /> Jun 7.80 0.09 <br /> Jul 8.06 0.03 <br /> Aug 7.13 0.09 <br /> Sep 5.40 0.22 <br /> Oct 3.72 0.52 <br /> Nov 1.80 1.10 <br /> Dec 0.93 1.55 0.62 <br /> Sum: 53,37 in/yr 9.88 in/yr 1.28 in/yr <br /> * Source: California Irrigation Management Information Systems(Zone 12) <br /> (www.cimis.water.ca.gov) <br /> ** Source: Western Regional Climate Center(Station 048999)March 1906 to May 2016 <br /> (http://www.wrcc.dri.edu/) <br /> *** Assumption: If monthly precipitation exceeds potential ET then <br /> the difference is potential deep percolation. <br /> Plate 7 <br />