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Table 2.1-1. Monthly rornials for temperature (°F) Precipitation (inches) acd heating and cooling degree days <br />for Craig, Colorado, based on National k'eather Service records from 1941-1970 <br />Month <br />l~brmals Jan Feb Maz Apr May Jim Jul Aug Sept Oct Nov Dec Means <br /> <br />Te~erature 17.3 22.4 29.7 42.1 51.5 59.0 66.6 64.7 56.1 45.4 31.8 21.7 42.4 <br />Precipitation 0.92 0.83 0.95 1.40 1.36 1.38 0.97 1.51 1.09 1.32 0.94 1.11 13.78 <br />Heating <br />Degree Day (1) 1479 1193 1094 667 419 193 32 58 275 608 996 1342 8376 <br />Cooling <br />Degree Day (2) 0 0 0 0 0 13 82 49 8 0 0 0 152 <br />(1) Heating degree day data are obtained by subtracting the mean temperature (°F) for each day fran 65 °F. <br />Daily values thus obtained are aided to obtain [he ironthly totals presented above. Tne need for heating of <br />buildings is considered none or slight if a day has a man temperature of 65°F or higher. <br />(2) Cooling degree day data aze obtained by subtracting 65°F from [he man te~erature above 65°F each day. <br />The daily values thus obtained aze then aided [o obtain the tenthly totals presented above. The neej fnr <br />cooling of buildings is considered none or slight if a day has a mean temperature of 65°F or loser. <br /> <br />2-6 <br />