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U. S. Fish and Wildlife Service - 04189 <br />Colorado River at <br />West Water <br />Temperature, Water (Deg. C) Calendar Year 1987 <br /> July August September October November December <br />Day Min Max Avg Min Max Avg Min Max Avg Min Max Avg Min Max Avg Min Max Avg <br />1 20.0 21.0 20.4 21.0 22.5 21.8 20.0 22.0 20.9 15.0 16.0 15.6 ---- ---- ---- ---- ---- ---- <br />2 20.0 21.5 20.8 22.0 23.5 22.5 20.5 22.0 21.3 15.0 16.0 15.5 ---- ---- ---- ---- ---- ---- <br />3 20.0 21.0 20.6 22.5 24.5 23.4 21.0 22.0 21.3 15.0 16.0 15.4 ---- ---- ---- ---- ---- ---- <br />4 19.0 21.0 19.9 23.0 24.5 23.8 20.0 21.5 20.8 14.5 15.5 15.1 ---- ---- ---- ---- ---- ---- <br />5 20.0 21.0 20.5 23.0 24.0 23.5 20.0 21.0 20.4 14.5 15.5 15.0 ---- ---- ---- ---- ---- ---- <br />6 20.0 21.0 20.6 23.0 24.0 23.4 19.0 20.5 19.8 14.5 15.5 15.0 ---- ---- ---- ---- ---- ---- <br />7 ---- ---- ---- 23.0 24.0 23.2 19.0 20.0 19.4 14.5 15.5 15.1 ---- ---- ---- ---- ---- ---- <br />8 ---- ---- ---- 23.0 24.5 23.7 18.5 19.5 18.9 15.0 16.0 15.3 ---- ---- ---- ---- ---- ---- <br />9 ---- ---- ---- 23.0 24.0 23.3 18.5 19.5 18.9 14.5 15.0 14.8 ---- ---- ---- ---- ---- ---- <br />10 ---- ---- ---- 22.0 24.0 22.9 18.0 19.0 18.4 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />11 ---- ---- --- 23.0 23.5 23.2 18.0 19.5 18.7 14.0 15.0 14.5 ---- ---- ---- ---- ---- ---- <br />12 ---- ---- ---- 22.5 24.0 23.2 18.0 19.0 18.4 14.0 14.5 14.3 ---- ---- ---- ---- ---- ---- <br />13 ---- ---- ---- 22.5 23.0 22.8 17.0 18.5 17.8 13.0 14.0 13.8 ---- ---- ---- ---- ---- ---- <br />14 ---- ---- ---- 21.0 22.0 21.5 16.0 16.5 16.3 13.0 13.0 13.0 ---- ---- ---- ---- ---- ---- <br />15 23.0 24.0 23.5 20.0 21.0 20.3 15.5 17.0 16.3 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />16 22.0 23.0 22.6 20.0 21.0 20.4 16.5 17.5 17.0 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />17 21.5 22.0 21.8 20.0 21.5 20.8 16.5 18.0 17.3 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />18 20.5 21.0 20.7 20.0 21.5 20.8 17.0 18.0 17.4 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />19 20.0 21.5 20.6 20.5 22.0 21.3 16.0 17.5 16.8 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />20 19.0 20.5 19.9 20.5 21.0 20.8 16.0 17.5 16.8 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />21 19.0 21.0 19.7 20.5 22.0 21.3 16.0 17.5 16.8 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />22 20.0 22.0 21.0 21.5 22.5 22.0 16.0 17.0 16.5 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />23 21.0 23.0 21.8 21.0 22.0 21.3 16.0 17.0 16.5 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />24 21.5 23.0 22.3 20.0 21.0 20.7 16.0 17.0 16.6 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />25 22.5 23.5 23.1 19.0 20.0 19.5 16.5 18.0 17.2 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />26 22.0 23.5 22.8 18.0 19.5 18.7 17.0 18.0 17.4 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />27 22.5 24.5 23.6 19.0 20.0 19.3 17.5 18.5 17.9 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />28 23.5 25.0 24.4 19.0 20.0 1tI.3 17.0 18.0 17.5 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />29 23.0 24.0 23.8 19.0 20.5 19.6 16.0 17.0 16.6 ---- ---- ---- ---- ---- ---- ---- ---- <br />30 22.0 23.0 22.5 19.5 20.5 20.0 16.0 16.5 16.2 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />31 22.0 22.5 22.3 19.5 21.0 20.3 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />MONTH ---- ---- ---- 18.0 24.5 21.6 15.5 22.0 18.1 ---- ---- ---- ---- ---- ---- ---- ---- ---- <br />4 <br />M M M M M M M