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i <br /> Table 5 , Estimated reference evapotranspiration (ETn) rates (inches/day) for regions <br /> Of similar climates* <br /> Region Jan Feb Liar Apr Hay Jun Jul Aug Sep Oct Nov Dec <br /> ETo Unrheay) <br /> ` Northeast <br /> mtn. valleys 0 . 02 0 . 04 0 . 07 0 . 12 0. 16 0 . 20 0 . 25 0.21 0. 15 0, 09 0. 03 0 . 02 <br /> North coast <br /> f interior <br /> valleys 0. 03 0. 05 0 . 08 0 . 11 0 . 16 0 . 20 0 , 21 0.19 0 . 15 0. 09 0 .04 0 . 02 <br /> Central coast <br /> coastal <br /> valleys 0. 06 0 , 08 0. 10 0 . 14 0. 16 0 . 18 0. 15 0 . 18 0. 15 0. 11 0 . 08 0 . 06 <br /> Central coast i <br /> interior <br /> valleys 0.05 0 . 07 0 . 11 0. 15 0, 18 0. 18 0 .21 0 . 20 0 . 17 0. 12 0 . 07 0.05' <br /> South coast. <br /> interior <br /> FIvalleys 0 . 07 0. 09 0 . 11 0 . 15 0 .17 0 . 20 0 . 22 0 .20 0 . 18 0 . 13 0 . 09 0 . 06 <br /> South coast <br /> coastal valleys <br /> and plains 0 . 07 0,09 0 , 10 0 . 12 0 . 14 0 . 15 0 .17 0 . 15 0 . 13 0 . 11 0 . 08 0. 05 <br /> Sacramento <br /> f valley 0 . 03 0 ..07 0 . 11 0. 16 0 .20 0. 25 0. 26 0 .23 0.18 7 . 13 0 . 06 0 . 03 <br /> San Joaquin <br /> valley 0.03 0 . 06 0 . 1. 1 0 . 16 0 .21 0.26 0 . 27 0.23 0 . 18 0 . 11 0. 05 0 . 02 <br /> iSoutheastern <br /> desert. 0.09 0 . 13 0 . 19 0 , 27 0 . 33 0 . 38 0 .38 0 . 32 0 . 28 0 . 20 0 . 12 0.07 <br /> F <br /> *Actual E T o rates are variable within each region and can be adjusted upward or <br /> F11, <br /> downward depending on the local climate relative to average for the region. A monthly <br /> ETo rate more than 1.0 percent above or below these given would be unusual , <br /> r <br /> 18 <br />