GRANITE REEF DAM, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(023621) GRANITE REEF DAM
From Year=1893 To Year=1979
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 402 280 179 52 9 0 0 0 0 18 152 369 1461
60 253 155 78 15 2 0 0 0 0 4 64 224 796
57 173 96 40 6 1 0 0 0 0 1 33 148 498
55 127 66 24 3 0 0 0 0 0 1 20 106 347
50 48 20 5 0 0 0 0 0 0 0 4 38 115
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