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Month <br />Precipitation and [To for South Stockton, CA <br />*** Estimated <br />*Ave. Eto **Ave. Precip. Deep Perc. <br />(in/mo) (in/mo) (in/mo) <br />Jan 1.24 2.80 1.56 <br />Feb 1.96 2.24 0.28 <br />Mar 3.41 2.03 <br />Apr 5.10 1.14 <br />May 6.82 0.41 <br />Jun 7.80 0.10 <br />Jul 8.06 0.03 <br />Aug 7.13 0.04 <br />Sep 5.40 0.25 <br />Oct 3.72 0.73 <br />Nov 1.80 1.71 <br />Dec 0.93 2.30 1.37 <br />Sum: 53.37 in/yr 13.78 in/yr 3.21 in/yr <br />* Source: California Irrigation Management Information Systems (Zone 12) <br />(www.cimis.water.ca.gov) <br />** Source: Western Regional Climate Center (Station 048558) Sept 1948 to June 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 8