GRAND CANYON NATL PARK, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(023595) GRAND CANYON NATL PARK
From Year=1957 To Year=1977
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1068 884 859 624 354 119 8 24 157 474 784 1034 6388
60 913 742 704 474 210 45 1 3 61 321 634 879 4986
57 820 658 611 384 141 21 0 1 30 237 544 786 4231
55 758 601 549 327 106 12 0 0 18 187 484 724 3765
50 603 460 395 195 46 2 0 0 4 93 336 569 2704
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