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92 SOIL SURVEY <br />TABLE i.--TEMPERATURE AND PRECIPITATION DATA <br /> Temperaturet Precipitationl <br /> 2 years in , 12 yea rs in 10, <br /> tO will have-- ; Average ; ; will <br />- have-- Average <br />- <br />Month ;Average; Average;Averag e; ;number of; Average; ;number of;A verage <br />; daily ; daily ; daily ; Maximum Minimum ; growing ; ; Less ; More ;days with;s nowfall <br />;maximum; minimum; ;temperature temperatur e; degree ; ;than- -;than--;0.10 inch; <br /> higher ; lower ; days2 or more ; <br /> than-- , than-- <br /> OF ; OF OF ; OF of In ; In ; In ; In <br />January----; 39.9 10.5 ; 25.3 65 ; -19 ; 37 ; .35 .08 .55 5.3 <br />February --- ; 45.3 ; 16.4 30.9 71 -11 57 .29 ; .15 ; .41 ; 1 4.6 <br />March ------ ; 51.2 ; 22.5 ; 35.8 78 ; -4 100 .76 ; .30 ; 1.12 3 ; 8.1 <br />April ------ ; 61.8 ' 32.7 47.3 ; 84 12 248 ; 1.36 .46 ; 2.07 3 ; 4.3 <br />May -------- ; 72.6 ; 43.3 ; 58.0 ; 92 ; 27 ; 558 ; 2.16 .87 ; 3.20 ; 5 ; .3 <br />June ------- ; 82.8 ; 52.0 ; 67.4 100 ; 39 ; 822 ; 1.81 ; .74 ; 2.67 ; 4 ; .0 <br />July ------- ; 89.3 1 57.3 ? 73.4 ; 100 ; 47 ; 1,035 ; 7.24 , .47 ; 1.85 ; 3 1 .0 <br />August ----- ; 86.9 54.9 70.9 99 43 958 ; 1.22 ; .42 1.85 3 .0 <br />September--; 77.8 44.6 51.3 94 29 639 1.33 .36 ; 2.10 ; 3 .6 <br />October ---- ; 66.8 33.8 50.3 85 ; 16 333 .91 ; .22 ; 1.46 ; 2 ; 3.0 <br />November --- ; 50.8 ; 21.7 ; 36.3 74 -1 65 ; .53 ; .14 ; .84 ; 2 <br />i 5.4 <br />December --- ; 42.0 ; 13.9 ; 28.0 ; 67 ; -13 8 .31 ; .04 ; .52 ; 1 ; 4.1 <br />Year ----- ; 63.9 33.6 48.8 101 -21 4,860 12.27 ; 9.55 ;14.84 31 ; 35.7 <br />iRecorded in the period 1951-74 at Greeley, CO. <br />2A growing degree day is an index of the amount of heat available for plant growth. It can be calculated <br />by adding the maximum and minimum daily temperatures, dividing the sum by 2, and subtracting the temperature <br />below which growth is minimal for the principal crops in the area (400 F).