GRAND CANYON HQ, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(023591) GRAND CANYON NATL PARK
From Year=1903 To Year=1957
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1106 907 831 560 330 94 15 26 125 457 767 1036 6253
60 951 766 676 410 194 36 2 4 45 306 617 881 4888
57 858 681 583 323 132 16 0 1 22 224 527 788 4156
55 796 625 521 269 99 9 0 0 13 176 467 726 3700
50 641 484 368 152 42 2 0 0 3 84 321 571 2667
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