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Table 2.1-1a <br /> Monthly Normals for temperature (F°) Precipitation (inches) and heating and cooling degree days for <br /> Craig, Colorado, based on National Weather Service records from 1977 to July 2017, (COOP Station <br /> CRAIG 4SW) <br /> Month Annual <br /> Normals Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Mean <br /> Temperature 18.2 22.7 33.9 42.3 50.9 61.2 67.8 65.9 57.2 45.5 32.0 20.4 42.96 <br /> Precipitation 1.13 1.15 1.42 1.68 1.54 1.09 1.21 1.26 1.63 1.72 1.36 1.06 16.75 <br /> Heating Degree Day(1) 1450 1217 988 670 433 148 22.8 41.5 249 611 993 1378 8235 <br /> Cooling Degree Day(2) 0 0 0 0 0.52 27 107 70.7 7.26 0 0 0 198 <br /> (1) Heating Degree Day units are computed as the difference between the base temperature and the daily <br /> average temperature. (Base Temp. - Daily Ave.Temp.) One unit is accumulated for each degree Fahrenheit the <br /> average temperature is below the base temperature. Negative numbers are discarded. <br /> (2)Cooling Degree Day units are computed as the difference between the daily average temperature and the <br /> base temperature. (Daily Ave.Temp.-Base Temp.) One unit is accumulated for each degree Fahrenheit the <br /> average temperature is above the base temperature. Negative numbers are discarded. <br /> 2-6a <br /> Revision: /i/V 7 <br /> Approved: <br />