BRIGHT ANGEL RS, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(021001) BRIGHT ANGEL RANGER STN
From Year=1925 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1177 1024 997 748 526 253 104 153 320 639 908 1119 7966
60 1022 882 842 598 373 131 23 44 178 484 758 964 6298
57 929 798 749 509 284 79 6 14 107 391 668 871 5404
55 867 741 687 450 229 52 2 6 71 331 608 809 4851
50 712 600 532 305 117 15 0 0 19 191 459 654 3604
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu