GRAND CANYON NATL PARK, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(023595) GRAND CANYON NATL PARK
From Year=1957 To Year=1977
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 0 0 4 63 242 433 367 172 23 0 0 1304
57 0 0 0 1 36 191 371 306 124 11 0 0 1040
60 0 0 0 0 13 125 279 215 65 2 0 0 699
65 0 0 0 0 1 50 132 81 12 0 0 0 275
70 0 0 0 0 0 13 34 14 0 0 0 0 60
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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